PATENTS . ':-.~'ot}

Granted in theMetal Finishing FieldPrinted copies of patents are furnished by the Patent and Trademark Office for $3.00 each.Address orders to: Commissioner of Patents and Trademarks, Washington, D.C. 20231.

POWDB COATING GUNU.S. Patent 5,908,162. June 1, 1999R.G. Klein et al., assignors toNordson Corp., Westlake, OhioA spray gun having an anti-back­ionization probe with a controlsystem.

IUCTIIOfOIIIIID .....111U.S. Patent 5,908,285. June 1, 1999J.M. Graff, assignor to UnitedTechnologies Corp., Hartford, Conn.

A method of protecting compositecomponents of a part with an elec­troformed sheath comprising se-

curing an electrically conductivemandrel insert in a mandrel; elec­troplating a head section andpressure and suction sides aroundthe mandrel insert to form withthe mandrel insert a sheath body;removing the mandrel from thesheath body so that a sheath cav­ity is defined within the sheathbody by the position occupied bythe mandrel and a tail section ofthe mandrel insert projects fromthe head section into the sheathcavity to form the electroformed

sheath; and securing compositecomponents of the part within thesheath cavity so that the electro­formed sheath protects the com­posite components.

....... AIITICUSU.S. Patent 5,908,477. June 1, 1999W.L. Harmer et al., assignors to 3MCo., St. Paul, Minn.

An abrasive article comprising abacking having a first major sur­face and a second major surface; aplurality of abrasive particles; at

One size does NOT fit all!DIFFERE T chrome plating applications... DIFFERE T bath chemistrie... DIFFERE T equipment...

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Graph of concentration v surface tension for the different LO-MI T formulation.

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EXTRAORDINARY

STAiNLUS STIlL PlCIWNG ANDPASSIVAnONU.S. Patent 5,908,511. June 1, 1999M. Bianchi, assignor to ITB S.r.l.,Milan, ItalyA pickling process for chromiumcontaining stainless steel com­prising placing in a pickling bathkept at a temperature rangingfrom 30 to 70·C and wherein thepickling bath comprises H2S04

in an amount of at least 150 gIL;Fe t:l ions in an amount of atleast 15 gIL; HF in an amount ofat least 40 gIL; stabilized H20 2

in an amount between 1 and 20gIL; nonionic surfactants or an­ionic fluorinated surfactants intotal amount of about 1 gIL; andfeeding to the bath during theprocess a continuous air flow ofat least 3 m3lhr per m3 bath,through a diffuser distributingthe flow in the liquid bath; stabi­lized H20 2 in a quantity adjustedto keep a Redox potential of thebath of at least 250 mV; and abath pH up to 1.5.

SUII.ACI-eoNDITIONING AGINTU.S. Patent 5,908,512. June I, 1999S. Shirahata et al., assignors toNippon Paint Co. Ltd., Osaka,Japan

least one body system formedfrom a composition comprising abinder precursor and about 15%by weight or less of a wax­containing modifier wherein thebond system adheres the plural­ity of abrasive particles to thefirst major surface of the back­ing.

AIIRASIVI GRAINU.S. Patent 5,908,478. June 1, 1999W.P. Wood, assignor to 3M Co., St.Paul, Minn.A method for making alpha alu­mina-based ceramic abrasivegrain.

March 2000 7S