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THE COOPERATIVE PATENT CLASSIFICATION (CPC) IN DWPI ON STN BRIAN LARNER PRODUCT SPECIALIST 18 March 2013
THE COOPERATIVE PATENT CLASSIFICATION (CPC) IN DWPI ON STN
BRIAN LARNER PRODUCT SPECIALIST 18 March 2013
AGENDA • What is CPC?
• Will it have any effect on my patent searches?
• How will it be implemented in DWPI on STN
WHAT IS CPC? • CPC stands for Co-operative Patent Classification
• It is a joint effort from the EPO (European Patent Office) and the USPTO (United States Patent & Trademark Office) to unify their classification systems – It is hoped to extend this system (or a variation of it) to the
Chinese, Japanese & Korean Patent Offices at a later date as part of the IP5 project
• It is based mostly on the EPO’s ECLA (European Classification) & ICO (In-computer only) coding systems giving a total of around 251,000 codes – This is far more than the current ECLA, IPC or USPC (US
Patent Classification) systems and so will be more detailed
CPC SCHEME CONTENT
ECLA 145K Symbols
ECLA 40K ICO Symbols + Y Section of ICO + EPO
controlled Keywords
USPC G06Q Business methods scheme, refined to
incorporate 705 USPC subdivisions
USPC Special Cross-
Reference Collections and Digests (Section Y)
CPC ~251K Classification
Symbols jointly classified and
maintained by both the EPO and the
USPTO
CPC TIMELINES – FROM THE EPO • From 1st January 2013 EPO examiners will apply CPC to EP patent data
and subset of the PCT minimum documentation data (including DE, CA, WO, etc)
– Available in the DocDb/INPADOC files – Application of ECLA and ICO codes to new documents will cease – From 1st January 2013 EPO examiners will cease to apply ECLA codes to any
documents so even older patents that they are classifying for the first time will have only CPC codes applied
– It is expected that CPC codes will be available for EP documents within 1 to 2 weeks of publication in most cases
– For patents from other authorities that are classified by the EPO examiners they could be a delay of up to 6 months in some technology areas before the CPC’s appear
– All support for ECLA / ICO withdrawn from 1st April 2013
• Certain national patent offices (Currently UK, SE, ES) will also assign CPC codes to their patents
For historical reasons, coverage is also available for BE, NL and LU, and also partial coverage is available for AT, AU and CA.
The EPO also applies CPC to a subset of The PCT Minimum Documentation
6
Regional system
Begin Date
National Authority
Begin Date
EP 1978 (start) CH 1920* WO 1978 (start) DE 1920* AP 1984 DE-U 1985 OA 1966 FR 1902
GB 1909 US 1920* ( * or earliest date)
CPC TIMELINES – FROM THE USPTO • From March 2013 the USPTO will apply CPC and/or USPC
until sometime in 2015 when the USPC will be phased out – CPC codes will be printed on the front page of the document and so will
be available on the day of publication – First patent applications with CPC codes on are expected to appear on
14th March 2013 – Published US patent applications will contain both US classes and CPC
codes between 2013 and 2015 – Granted US patents will initially contain predominantly US classifications – The first US grants with CPC on will appear either in February or March – CPC classes applied by the USPTO will be propagated to all members
of the simple patent family (ones that share identical priority data)
WHAT ABOUT OLDER PATENTS? • All older patents which were classified using ECLA
codes will be re-classified using CPC by the EPO and / or USPTO – This includes all EP patents & US documents back to
1920
• USPTO will additionally re-classify any US documents for which no ECLA codes exist including pre-1920 data
• This data will be made available to search later in 2013
THE NEW CODES • On initial release the CPC codes will map onto existing
ECLA and / or ICO codes – ECLA codes are based on the IPC system but have additional sub-
divisions to give more precise coding. These will be called inventive CPC codes in the new system
– ICO codes use a mirrored ECLA hierarchy sometimes with additional granularity and describe non-inventive features of the patent – these will be described as additional CPC codes in the new system
• From 1st April 2013 the CPC system will commence a process of monthly updates at which point the systems will begin to diverge
• Notification of the updates will be made publically available
Example: The IPC-like CPC hierarchy • The "root" of the hierarchically closest IPC symbol is used
IPC H01L21/027 H01L21/033
ECLA H01L21/027 H01L21/027B H01L21/027B2 H01L21/027B6 H01L21/027B6B H01L21/027B6B2 H01L21/027B6B4 H01L21/027B6C H01L21/027B6D H01L21/027B6E H01L21/033
CPC H01L21/027 H01L21/02709 H01L21/02718 H01L21/02727 H01L21/02736 H01L21/02745 H01L21/02754 H01L21/02763 H01L21/02772 H01L21/02781 H01L21/033
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HOW WILL IT AFFECT MY SEARCHES? • As CPC is simply a replacement for USPC, ECLA & ICO
codes it will not affect any searches that do not use these – In particular IPC, Japanese National Classification and Derwent
Manual Code searches will be unaffected
• If you use ECLA and/or ICO codes any search using these codes will not pick up new patents published on or after 1st January 2013 or any older documents classified after that date – So any alerts that use these codes will need to be changed
• Searches using USPC will continue to work until 2015 when you will need to start using CPC to find new patents
WHAT DO I DO IF MY SEARCH / ALERT IS AFFECTED?
• Searches based on ECLA / ICO codes will continue to find patents published / classified up until the end of 2012
• To find patents published / classified after this date you will need to include CPC codes – For alerts replace the ECLA search term by the corresponding CPC search term – For searches that go further back OR in the CPC search term – only needed until
the back file reclassification is available
• Thomson Reuters Search Services will be happy to help you update your alerts for a fee or you can – Browse the CPC hierarchy to identify the best codes to use – Use the expand command (CPC thesaurus) on STN – Use the following link for the concordance tables
http://www.cooperativepatentclassification.org/deliverables/cpcConcordances.html
WHAT IF I USE US CLASSIFICATIONS IN MY SEARCH? • For the moment you can continue to use them as
normal
• However it would be a good idea to review the CPC codes applied to the patents in your search / alert results to identify the best ones to use
• You can switch to CPC anytime in the next 2 years – As both CPC and USPC will exist alongside each other
during this time you can run CPC and USPC alerts along side each other to check you have got the best available strategy
– CPC may become more precise than USPC as a result of updates to the system and so may be a better option
COULD CPC HELP ME DO BETTER SEARCHES?
• If you currently use IPC then you may wish to consider using CPC instead as it has the following benefits – More granular so you can drill down more precisely to the
technology area you are interested in – Codes will be applied by a much smaller group of people, it
should be more accurately and consistently applied than IPC – As it is based on IPC you could search your IPC code +NT to
search all CPC codes related to the IPC concept (e.g. S A23K0001-18+NT/CPC)
– Updated more often so it will keep up with technology trends more effectively
– You can include searches on non-inventive features to broaden your search
– Will still cover most PCT minimum documentation authorities
ANY DISADVANTAGES TO USING CPC? • The monthly updates to CPC mean that the most specific codes could
change fairly frequently in areas such as biotech and telecommunications which are rapidly evolving so you should be careful when using them in alerts
– This is not a problem for one off searches though
• Only US patents will have CPC codes available on the day of publication, for other patents they will only be available via the INPADOC file
• The EPO examiners can be quite slow applying CPC codes to patents from authorities other than EP patents, so for alerts it is best to also include other classification systems (e.g. IPC or DWPI manual codes) in your alert
– The USPTO is expected to be timely in applying CPC to US patents
• When using CPC remember to monitor your alert results for any sudden fall off in the number of hits as this could indicate a reclassification has affected your search
CPC IN DWPI ON STN • CPC data has now started to be loaded into the DWPI files
– For US patents which will include CPC as part of the front page data the CPC codes will be added when the patent record is loaded as a basic or equivalent
– For patents classified by other patent offices the CPC data will be loaded as part of the quarterly INPADOC update • The first update which includes the full back file is expected in May 2013
• Once revisions start next month the original and most up to date CPC will be available for each record or you can search all CPC
• The ECLA, ICO & USPC data for existing patents in the database will be retained
CPC data at the member level will include the following attributes • This data should be available once the backfile is
loaded
• Classification value – I (Invention), A (Additional)
• Position – F (First), L (Later)
• Classification status – O (Original), R (Reclassified)
CPC IN DWPI ON STN
IC ICM C08F210-18 (This is an example of the invention level data) ICS C08F004-642 IPCR C08F0010-00 [I,A]; C08F0210-00 [I,C]; C08F0210-18 [I,A]; C08F0004-00 [I,C]; C08F0004-60 [I,A]; C08F0004-64 [I,A]; C08F0004-642 [I,A]; C08F0004-658 [I,A]; C08F0004-659 [N,A]; C08F0004-6592 [N,A]; C08F0004-6592 [I,A] CPC C08F0004/65912; C08F0004/65916; C08F0004/65926; C08F0210/18 EPC C08F0010-00+4/02V; C08F0210-18
IPCR Current: C08F0010-00 [I,A]; C08F0210-18 [I,A]; C08F0004-659 [N,A]; C08F0004-6592 [N,A] (This is an example of the member level data) IIC IICM C08F004-64 IICS C08F236-20 CPC Current: C08F0004/65912; C08F0004/65916; C08F0004/65926; C08F0210/18 Initial: C08F0004/65912; C08F0004/65916; C08F0004/65926; C08F0210/18 INCL INCLM 526/160.000 INCLS 526/127.000; 526/129.000; 526/282.000; 526/283.000; 526/336.000 EPC C08F0010-00+4/02V; C08F0210-18
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The Cooperative Patent Classification (CPC) in DWPI on STN: Part 2
Robert Austin – FIZ Karlsruhe
Implementation of CPC on STN
• CPC codes are provided in WIPO ST. 8 – Same standard as IPC reform codes – Attributes are very similar to IPC attributes
• Search and display of CPC is therefore very similar to the implementation of IPC on STN – Analogous search, display and analysis options
• An STN CPC thesaurus feature is available! – Similar to the IPC and ECLA thesauri – Allows for simple hierarchical searching, e.g.
=> S A61K0047-48369+NT /CPC
2
Implementation of CPC on STN (cont.)
• /CPC – the search and display field for all codes – Including Original and Reclassification codes
• /CPC.KW – the search field for CPC attributes – Classification value (I,A), classification status (O,R),
source of classification (H,M,G), generating office – Use the CPC.TAB format to display CPC attributes
• For specific CPC searches CPC codes and attributes can be linked with (S)-proximity – E.g. => S A61K0047-48384 /CPC (S) I /CPC.KW
3
Searching CPC on STN
4
=> S A61K0047-48384/CPC CPC search in STN-standard format.
=> S A61K0047/CPC CPC search at main group level.
=> S A61K/CPC CPC search at subclass level.
=> S A61K0047-48384/CPC(S)I/CPC.KW CPC search + attributes.
=> S A61K0047-48369+NT/CPC CPC search with all narrower terms.
Displaying CPC on STN
5
=> D CPC.TAB.M
L1 ANSWER 1 OF 1 WPIX COPYRIGHT 2013 THOMSON REUTERS on STN Member(0001) CPC CODE VERSION POS INV CC ASSIGNMENT DATE STAT ---------------- ---------- --- --- -- ---------- -------- ---- Current F23R2900-00012 (20130101) A EP Human 20130101 O F23R0003-007 (20130101) I EP Human 20130101 O F23R0003-60 (20130101) I EP Human 20130101 O
=> D TI PA PN IPC CPC
L1 ANSWER 1 OF 1 WPIX COPYRIGHT 2013 THOMSON REUTERS on STN TI Combustion chamber of turbo engine e.g. gas turbine engine, has spark plug chamber extension, acoustic damper, sensor or valve which is arranged in a recess of combustion chamber main portion and sealed with a seal PA (RORO-C) ROLLS-ROYCE DEUT LTD&CO KG PI EP 2511613 A2 20121017 (201277)* EN 11[5] IPCI F23R0003-00 [I,A]; F23R0003-60 [I,A]; F23R0003-00 [I,A] CPC F23R2900-00012; F23R0003-007; F23R0003-60
The CPC display provides a simple list of CPC codes.
The CPC.TAB.M display provides a detailed view of CPC attributes.
The CPC display field is included in standard display formats, e.g. ALL.
Searching CPC is very similar to IPC
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=> S B23K/IPC,CPC 317607 B23K/IPC 111984 B23K/CPC L1 323679 B23K/IPC,CPC => S B23K0026/IPC,CPC 48317 B23K0026/IPC 16679 B23K0026/CPC L2 49530 B23K0026/IPC,CPC => S B23K0026-00/IPC,CPC 27633 B23K0026-00/IPC 324 B23K0026-00/CPC L3 27671 B23K0026-00/IPC,CPC => S B23K0026-00+NT/IPC,CPC 48315 B23K0026-00+NT/IPC (25 TERMS) 16679 B23K0026-00+NT/CPC (182 TERMS) L4 49528 B23K0026-00+NT/IPC,CPC => S B23K0026-0003/CPC L5 130 B23K0026-0003/CPC
Searching CPC codes (/CPC) at the Subclass (L1), Group (L2) and Subgroup (L3) levels is analogous to IPC searching.
B23K0026-0003 = trimming metal with a laser beam.
The specific CPC code (/CPC) is also searchable (L5).
Automatically include thesauri narrower terms using +NT (see later).
The CPC thesaurus on STN
• Hierarchies of terms may be reviewed using EXPAND with a term followed by a plus symbol (+), a Relationship Code, and the appropriate field, i.e. /CPC – E.g. => E A61K0009-00+ALL /CPC
• Searches may be extended to incorporate Narrower,
Broader, Related, or other terms, using SEARCH with a term followed by a plus symbol (+), a Relationship Code, and the appropriate field, i.e. /CPC – E.g. => S A61K0009-7023+NT/CPC (10 TERMS)
7
Tip: to learn more about the Relationship codes available for a particular Thesaurus type HELP RCODE at the STN prompt (=>).
=> E A61K0009-00+ALL/CPC E1 0 BT5 A/CPC HUMAN NECESSITIES(2013-01-01) E2 0 BT4 A61-/CPC Health; amusement(2013-01-01) E3 0 BT3 A61/CPC MEDICAL OR VETERINARY SCIENCE; HYGIENE(2013-01-01) E4 309271 BT2 A61K/CPC PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES ● ● ● E5 5611 BT1 A61K0006/CPC E6 361 --> A61K0009-00/CPC Medicinal preparations characterised by special physical form reference: ● ● ● E175 834 NT2 A61K0009-7023/CPC CPC-specific-text: Transdermal patches and similar drug-containing composite devices, e.g. cataplasms reference: galenical aspects of iontophoretic devices ● ● ● E184 180 NT4 A61K0009-7092/CPC CPC-specific-text: Transdermal patches having multiple drug layers or reservoirs, e.g. for obtaining a specific release pattern, or for combining different drugs (2013-01-01) ********** END ********** => S A61K0009-7023+NT/CPC L1 2983 A61K0009-7023+NT/CPC (10 TERMS)
Example: CPC thesaurus (A61K0009-00)
8
Review CPC Thesaurus (/CPC) hierarchies and definitions, e.g. using the +ALL Relationship Code.
Codes unique to CPC are identified and the version is given in parentheses.
Use +NT to search a chosen CPC, and all its narrower terms in one step.
=> E ANTIBODY+KT/CPC E1 0 --> antibody/CPC E2 0 KT Antibody antigen-binding fragment thereof that binds gram-negative bacteria/CPC E3 0 KT Antibody antigen-binding fragment thereof that binds gram-positive bacteria/CPC E4 0 KT Antibody fragment thereof whose amino acid sequence is disclosed in whole part/CPC E5 0 KT Antibody fragments/CPC E6 0 KT Antibody mimetics scaffolds/CPC E7 0 KT Antigen-binding scaffold molecules wherein scaffold is not an immunoglobulin variable region antibody mimetics/CPC E8 0 KT Disulfide-stabilized antibody (dsFv)/CPC ● ● ● E60 0 KT polymer-drug antibody conjugates, e.g. mitomycin-dextran-Ab; DNA-polylysine-antibody complex conjugate, used therapy/CPC ● ● ● E65 0 KT the carrier being an antibody an immunoglobulin/CPC E66 0 KT wherein an antibody conjugate being used at least one steps; ligand-antiligand therapy/CPC ********** END **********
Example: use the relationship +KT (Keyword Terms) to identify classes
9
CPC definitions are included to allow identification of appropriate codes (KT=Keyword Term).
=> E E60+CODE E1 0 --> polymer-drug antibody conjugates, e.g. mitomycin-dextran-Ab; DNA-polylysine-antibody complex conjugate, used therapy/CPC E2 87 A61K0047-48692/CPC ********** END ********** ********** END ********** => E E2+ALL ● ● ● E8 272 BT2 A61K0047-48369/CPC CPC-specific-text: the modifying part being an antibody, an immunoglobulin, or a fragment thereof, e.g. a Fc-fragment(2013-01-01) E9 174 BT1 A61K0047-48507/CPC CPC-specific-text: the modifying agent being a well defined antibody or immunoglobulin bearing at least one antigen-binding site(2013-01-01) E10 87 --> A61K0047-48692/CPC CPC-specific-text: polymer-drug antibody conjugates, e.g. mitomycin-dextran-Ab; DNA-polylysine-antibody complex or conjugate, used for therapy(2013-01-01) ● ● ●
Example: Use the Relationship +ALL to explore definitions and a full hierarchy
10
Use +CODE to identify the code associated with the definition.
Use +ALL to explore definitions and the full hierarchy.
=> E A61K0047-48692+TI/CPC E1 0 BT9 a/CPC HUMAN NECESSITIES(2013-01-01) E2 0 BT8 A61-/CPC Health; amusement(2013-01-01) E3 0 BT7 A61/CPC MEDICAL OR VETERINARY SCIENCE; HYGIENE(2013-01-01) E4 309271 BT6 A61K/CPC PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES reference: devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J0003-00; ● ● ● E10 87 --> A61K0047-48692/CPC CPC-specific-text: polymer-drug antibody conjugates, e.g. mitomycin-dextran-Ab; DNA-polylysine-antibody complex or conjugate, used for therapy(2013-01-01) ********** END **********
Example: Use the Relationship +TI (Title) to stop at the code listed
11
Use +TI (Title) to see just the full title of the code expanded on.
=> E A61K0047-48692+HIE/CPC E1 0 BT9 a/CPC E2 0 BT8 A61-/CPC E3 0 BT7 A61/CPC E4 309271 BT6 A61K/CPC E5 5611 BT5 A61K0006/CPC E6 186 BT4 A61K0047-00/CPC E7 222 BT3 A61K0047-48/CPC E8 272 BT2 A61K0047-48369/CPC E9 174 BT1 A61K0047-48507/CPC E10 87 --> A61K0047-48692/CPC CPC-specific-text: polymer-drug antibody conjugates, e.g. mitomycin-dextran-Ab; DNA- polylysine-antibody complex or conjugate, used for therapy(2013-01-01) E11 46 NT1 A61K0047-487/CPC => S E9+NT L1 1363 A61K0047-48507+NT/CPC (27 TERMS)
Example: Use the Relationship +HIE to see a condensed list of an entire hierarchy
12
Use +NT to search a chosen CPC, and all its narrower terms in one step.
Use +HIE (Hierarchy) for a condensed list of all broader and narrower terms.
=> D TI CPC 1-30 L1 ANSWER … OF 1363 WPIX COPYRIGHT 2013 THOMSON REUTERS on STN TI Use of protein oligomer comprising at least two noncollagenous domain in the treatment or prevention of an angiogenesis-related disease e.g. rheumatoid arthritis, psoriasis and cancer CPC A61K0038-39; A61K0047-48692 L1 ANSWER … OF 1363 WPIX COPYRIGHT 2013 THOMSON REUTERS on STN TI New conjugate comprising linked interleukin specific subunits and single chain diabody, useful for treating cancer, rheumatoid arthritis, diabetic retinopathy, and age-related muscular degeneration, and inhibiting angiogenesis CPC A61K0047-48538; A61K0047-48423 L1 ANSWER … OF 1363 WPIX COPYRIGHT 2013 THOMSON REUTERS on STN TI Combination, useful for treating B-cell malignancies symptom including a CD19+ CD20+ B-cell malignancies symptom, comprises rituximab and an anti-CD19 maytansinoid immunoconjugate CPC A61K0047-48384; A61K0039-39558; A61K0047-48561; A61K2039-507; C07K0016-2803; C07K0016-2887 L1 ANSWER … OF 1363 WPIX COPYRIGHT 2013 THOMSON REUTERS on STN TI New compound comprising a water-soluble, non-peptidic polymer is useful for treating cancer selected from breast cancer, ovarian cancer, pancreatic cancer, stomach cancer, salivary cancer, lung cancer, and esophageal cancer in a patient CPC A61K0047-48215; A61K0047-48584
Example: A61K0047-48507+NT (CPC)
13
Tip: Use +NT (narrower terms) not truncation!
14
CPC H01L21/027
H01L21/0271 H01L21/0272 H01L21/0273
H01L21/0274 H01L21/0275 H01L21/0276
H01L21/0277 H01L21/0278 H01L21/0279
H01L21/033 H01L21/0331 H01L21/0332 H01L21/0334
H01L21/0335 H01L21/0337 H01L21/0338
H01L21/04
Truncation is not recommended as it may miss CPC classes from the hierarchy, for example:
Search question: Retrieve H01L21/027 and all narrower term subgroups – use the CPC thesaurus hierarchy (+NT) search.
=> S H01L21/027+NT/CPC L1 4449 H01L21/027+NT/CPC (17 TERMS) (H01L0021-027+NT/CPC)
=> S H01L21/027?/CPC L2 2250 H01L21/027?/CPC (H01L0021-027?/CPC) ×
Tip: Use ANALYZE to find CPC equivalent classes to a known USPC (/NCL) class
15
=> S 424/449.000/NCL L1 1786 424/449.000/NCL (424449000/NCL) => ANALYZE L1 CPC L2 ANALYZE L1 1- CPC : 1605 TERMS => D L2 ANALYZE L1 1- CPC : 1605 TERMS TERM # # OCC # DOC % DOC CPC ------ ------- ------ ------ --------------- 1 407 407 22.79 A61K0009-7061 2 346 346 19.39 A61K0009-7084 3 306 306 17.14 A61K0009-0014 4 284 284 15.88 A61K0009-7053 5 171 171 9.56 A61K0009-7023 . . . .
USPC (/NCL) 424/449.000 = transdermal patches.
Look up the definitions of CPC classes found in the analysis.
Tip: Use ANALYZE to find CPC equivalent classes to a known USPC (/NCL) class (cont.)
16
=> E A61K0009-7061+TI/CPC E1 0 BT12 a/CPC HUMAN NECESSITIES(2013-01-01) E2 0 BT11 A61-/CPC Health; amusement(2013-01-01) E3 0 BT10 A61/CPC MEDICAL OR VETERINARY SCIENCE; HYGIENE(2013-01-01) E4 282251 BT9 A61K/CPC PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES ● ● ● E8 657 BT5 A61K0009-7023/CPC CPC-specific-text: Transdermal patches and similar drug-containing composite devices, e.g. cataplasms reference: galenical aspects of iontophoretic devices ● ● ● E12 610 BT1 A61K0009-7053/CPC CPC-specific-text: obtained by reactions only involving carbon to carbon unsaturated bonds, e.g. polyvinyl, polyisobutylene, polystyrene(2013-01-01) E13 881 --> A61K0009-7061/CPC CPC-specific-text: Polyacrylates(2013-01-01) ********** END ********** ********** END **********
Hint: Any topic search may be researched in this way to identify CPC codes of interest.
Summary
• CPC is a new in-depth hierarchical system provided jointly by EPO and USPTO
• CPC implementation for DWPI on STN is straightforward, logical, and easy to start using
• Use the STN CPC Thesaurus for browsing and simplified hierarchical searching of CPC codes
17
Resources
• STN CPC Search and Display Fields http://www.cas.org/File Library/Products/STN/CPC-Search-and-Display-Fields.pdf
• CPC in INPADOC News 2012/11: http://www.stn-international.com/inpadoc_news_201211.html
• EPO CPC Workshop for external users: http://www.cooperativepatentclassification.org/publications/WorkshopMarchVienna.pdf
• U.S. classification (USPC) to CPC concordance http://www.uspto.gov/web/patents/classification/
• Browse the full CPC scheme: http://worldwide.espacenet.com/classification 18
Appendix: Status of CPC in STN patent files
19
Multinational value-add patent files
National patent files
USPATFULL / USPAT2
PCTFULL
AUPATFULL
JPFULL
INPADOC files
CAPLUS
DWPI files
CPC for updated and new documents
CPC for backfile
CNFULL
soon
soon
soon
. . .
CANPATFULL
FRFULL
GBFULL
FIZ Karlsruhe [email protected] Support and Training: www.stn-international.de
CAS E-mail: [email protected] Support and Training: www.cas.org
For more information …
