PATENTS

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.

PORCBAlN-ENAMIUD STDLSHUTSu.s. Patent 5,993,974. Nov. 30, 1999Y. Fukushima et al., assignors toKawasaki Steel Corp. Hyogo, Japan,and Kawasaki Steel Metal Products& Engineerinf( Inc., Hyogo, Japan

A porcelain enameled steel sheetcomprising an interstitial layerformed on a surface of an alumi•num-zinc alloy plated steel sheet;and an enamel coating layerformed on the interstitial layer.

COATI_ COMPOSITIONu.s. Patent 5,993,975. Nov. 30, 1999S. Tanaka and T. Nakano, assignorsto Kansai Paint Co. Ltd., Japan

A coating composition comprisinga polyester resin; a melamineresin curing agent; a chromaterust preventive pigment; organicpolymer fine particles having anaverage particle diameter to 6 to60 !-Lm, and a curing catalyst,which is a neutralization productbetween a sulfonic acid and anamine.

POLISHING APPARATUSU.S. Patent 5,997.390. Dec. 7. 1999J. Hose, assignor to Speedfam Corp.,Chandler, Ariz.

A polishing apparatus with im•proved alignment of polishingplates.

APPARATUS POll~IICOATINGU.S. Patent 5,997,643. Dec. 7, 1999T.E. Wi/.wIII et al., assif(nors toNordsoll Corp., Westlake, Ohio

A system for coating the interiorsurface of a hollow container bodymoving along a predeterminedpath through a can forming ma•chine with a powder coating ma-

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terial, the can forming machinehaving a welding arm comprisinga delivery passage extendingthrough the welding arm fortransporting a flow of air-en•trained powder, a coating gunmounted to the welding arm andconnected to the delivery passage;and an offset nozzle mountedwithin an outlet opening of thepowder gun to form a continuousannular spray opening with anenlarged portion for applyingpowder onto the interior surfaceof the container body.

Aau...,. STIlI....NG AIlIIDCUAN'" COMPOSI'I'IONU.s. Patent 5,997,658. Dec. 7, 1999D. W. Peters et al., assignors toAshland Inc., Dublin, Ohio

A hydroxlamine-free photoresiststripping and cleaning composi•tion comprising 70 to 85% byweight of an alkanolamine, 0.5 to2.5% of benzotriazole, 0.5 to 2.5%of gallic acid, and the remainderbeing water.

GALVAIlIIIZID STDL SHIOU.S. Patent 5,997,664. Dec. 7, 1999K. Tahara et al., assignors to NKKCorp., Tokyo

A method for producing a gal•vannealed steel sheet having anexcellent surface appearance.

MAGNnIION SPUTnIllNG SOURe.u.s. Patent 5,997.697. Dec. 7, 1999P. Gruenenfelder et aL., assignors toBalzers, LiechtensteinA magnetron sputtering arrange•ment comprising an axially sym•metrical magnetron sputteringsource; a holder for positioning adisk-shaped workpiece coaxially

to an axis of symmetry of thesputtering source and at a corre•sponding distance therefrom;wherein the sputtering source hasat least two toroidal magnetronelectron traps.

GALVAIlIIIC IMPOSITION CIILLU.S. Patent 5,997,701. Dec. 7, 1999M. Bock, assignor to Sono PressProduktionsgesellschafi Fur Ton•Und Informationstrager mbH,Gutersloh, Germany

An apparatus for the galvanicdeposition of a metal layer on asubstrate comprising a substrateholder connected to a drive shafthaving an outer insulating layer,and a cathode current supplied tothe substrate through the driveshaft.

C....II POlL POll A PIIINTIIDCIRCUIT BOAIIDU.S. Patent 5,997,710. Dec. 7, 1999M. Ohara et al., assignors to MitsuiMining & Smelting Co., Ltd., Tokyo

A process and apparatus for pro•ducing an electrolytic copper foilfor a printed wiring board.

CON'l'llOL A..... POll MDUClNGMft. ACID MIST ........U.S. Patent 5,997,711. Dec. 7, 1999S.H. Bourke, assignor to AONInternational Inc., Tucson, Ariz.

A method for reducing metal acidor salt evolved from electrolyticbaths housed in electrolytic tanksduring electrolytic operations,which comprises covering all ofthe surface of the electrolytic bathwith a layer of shredded foamthat floats at the surface, shred•ded foam being irregular and den•dritic in shape, lacking in uniform

Metel Finishing