fe ren t d i ame te r shots, the shots being made from a ma te r i a l hav- ing a ha rdnes s whe re in the hard- ness is a t leas t equal to a hard- ness of the p roduc t to be t r e a t e d and w h e r e i n the shots are in- jec ted at an inject ion p res su re of a t leas t 0.29 MPa and at a veloci ty of a t leas t 50 m/sec.

ABRASIVE ARTICLE U.S. Patent 6,039,775. Mar. 21, 2000 K.L. Ho et al., assignors to 3M Innovative Properties Co., St. Paul, Minn.

An abras ive ar t icle compris ing a backing hav ing a first major sur- face and a second major surface; a p lura l i ty of abras ive particles; a m a k e coat fo rmed f rom a first b i n d e r p r e c u r s o r , w h e r e i n t he m a k e coat bonds the p lu ra l i ty of

abras ive par t ic les to the first ma- jor surface of the backing; and a pe r iphera l coat ing layer compris- ing a gr ind ing aid formed f rom a mix tu r e compris ing an acid and an inorganic me ta l phospha te sal t or an inorganic me ta l sul fa te salt.

SPUI"rERING TARGET U.S. Patent 6,039,855. Mar. 21, 2000 N. Wollenberg, assignor to Leybold Materials GmbH, Hanau, Germany

A ta rge t for the spu t t e r i ng cath- ode of a v a c u u m coating appara- tus.

X-RAY MASK FABRICATION U.S. Patent 6,039,858. Mar. 21, 2000 R.J. Ackel et al., assignors to International Business Machines Corp., Armonk, N.Y.

A me thod for the e lec t ropla t ing on

one side of a subs t ra te , which is i m m e r s e d in an e l e c t r o p l a t i n g bath.

METHOD FOR ELECTROPLATING U.S. Patent 6,039,859. Mar. 21, 2000 W. Sonnenberg et al., assignors to Shipley Co. L.L.C., Marlborough, Mass.

A method for p la t ing a me ta l over a subs t r a t e compris ing forming a conduct ive coat ing by contac t ing wi th a s table aqueous dispers ion of d iscre te g raph i t e par t ic les in an aqueous medium.

CHROMIUM PLATING OF TITANIUM ALLOY U.S. Patent 6,039,860. Mar. 21, 2000 A.M. Cooper et al., assignors to McDonnell Douglas Corp., Seal Beach, Calif.

S Y S T E M A T I C S I N C . 26 BURNSIDE ST., BRISTOL, RI 02809 FOR MORE INFO & NEAREST DISTRIBUTOR CALL: 401 253 0050 FAX 401 253 1602 E-MAIL: SYSTINC@GIS.NET WEBSITE: WWW.SYSTINC.COM

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CrPur Chromic Acid Purification

ADVANTAGES

• Lower Power Use • Fewer Rejects • Shorter Plating Time • Stabilized Bath • Reduced Liability • Bath Life Extended

Virtually Forever • Minimal Operating

Requirements

I i

REASCO Modular Ion Exchange

• Heavy Metal Recovery • Rinse Water Recovery • Bath Purification • Effluent Polishing • D.I. Water

For Information On Design, Sales, Or Possible Representation, Contact:

RECOVERY ENGINEERING & SALES COMPANY

P.O. Box 297, Arvada, Colorado 80001-0297

PHONE: (303)292-5702 FAX: (303)292-5717

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102 Metal Finishing