Granted in the Meta l Finishing Field Printed copies of patents are furnished by the Patent and Trademark Office for $3.00 each. Address orders to: Commissioner of Patents and Trademarks, Washington, DoC. 20231.

HERMETIC ENCLOSURE FOR SOLVENT CLEANING U.S. Patent 5,799,677. Sept. 1, 1998 W.E. Sabatka and G. Melin, assignors to Finishing Equipment Inc., St. Paul, Minn.

An apparatus for treating a work- piece comprising a carriage for holding the workpiece; a first sta- tion for transferring the workpiece into and out of the carriage; a first chamber for holding treating fluid; a second station for transferring the workpiece between the carriage and the first chamber; a seal located proximate the second station; a po- sitioning plate for supporting the carriage; a backing plate, the back- ing plate and the positioning plate capable of being placed in sealing contact with the seal for isolating the first chamber from atmosphere; a mechanism for staging the car- riage, the mechanism capable of positioning the carriage at the first station and at the second station; and wherein the first chamber is capable of being isolated from at- mosphere when the carriage is lo- cated at the second station.

SPUTTERING TARGET A S S E M B L Y U.S. Patent 5, 799,860. Sept. 1, 1998 R.E. Demaray et al., assignors to Applied Materials Inc., Santa Clara, Calif.

A method for preparat ion and bonding of workpieces to form sputtering targets and other as- semblies.

HVLP SPRAY GUN U.S.Patent 5,799,875. Sept. 1, 1998 R. Weinstein and D.M. Seitz, assignors to Asahi Sunac Corp., Japan

A longitudinally extending fluid nozzle for an HVLP spray gun.

E X T E R N A L - M I X P L U R A L - C O M P O N E N T SPRAY GUN U.S. Patent 5,799,876. Sept. 1, 1998 B.G. Islet, assignor to Marti~ Marietta, Bethesda, Md.

A multiple material spray system for applying a spray by a single- component spray gun.

ABRASIVE BLASTING A P P A R A T U S U.S. Patent 5,80(],246. Sept. 1, 1998 N. Tomioka, assignor to Rich Hill lnc., Tokyo

A method of switching pressure between at least two pressure tanks provided in a blasting appa- ratus.

FLAT-LINE POWDER C O A T I N G SYSTEM U.S. Patent 5,800,615. Sept. 1, 1998 P.G. Lambert et al., assignors to Nordson Corp., Westlake, Ohio

A powder coating system compris- ing a conveyor for transferring a substantially flat article horizon- tally through a powder coating booth in a direction of travel; and at least one powder spray gun for ap- plying powder coating material.

A P P A R A T U S FOR IONIZED SPUTTERING U.S. Patent 5,800,688. Sept. 1, 1998 A.D. Lat~tsman and T.J. Licata, assignors to Tokyo Electrorz Ltd., Tokyo

An ionized physical vapor deposi- tion apparatus comprising a vac- uum sputtering chamber; a sput- tering target centered on an axis in the chamber; separately opera- ble power supplies including a cathode power supply and an RF energy source; parallel to the tar- get; and a shield encircling the chamber.

PICKL ING STAINLESS STEEL U.S. Patent 5,800,694. Sept. 1, 1998 J. Starcevic and E. MolAr, assignors to Al~dritz-Patentverwaltut~gs- Gesellschaft m.b.H., Graz, Austria

A process for pickling material str ips made of s ta inless steel compris ing select ing a mixed acid composed of a combination of hydrofluoric acid and nitric acid; placing a quant i ty of the mixed acid in at least one pick- ling path to form a pickling bath; and passing the strip through the pickling bath, wherein the composition and concentration of the mixed acid in the pickling bath are selected automatical ly and continuously controlled as a function of the mater ia l quality, o p e r a t i n g p a r a m e t e r s of the pickling bath, and the operating parameters of the p re t rea tment of the strip.

PLATING TURBINE ENGINE C O M P O N E N T S U.S. Patent 5,800,695. Sept. 1, 1998 D. Kalzg et al., assignors to Chromalloy Gas Turbine Colp., San Antonio

A process of electroplating a coat- ing onto a gas turbine engine com- ponent containing a plurality of cooling holes and a cooling passage interconnected therewith compris- ing injecting a plastic maskant into the cooling passage of the compo- nent filling the cooling holes of the component with the maskant; plat- ing the external surface of the com- ponent with a coating by immers- ing the component in a plating medium; and removing the mas- kant from the component wherein the organic maskant is removed by heating the component to a temper-

February 1999 115

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COPPER C O A T I N G OF PRINTED CIRCUIT B O A R D S U.S. Patent 5,800,859. Sept. 1, 1998 A.D. Price, Surrey, England and P.T. McGrath, Mission Viego, Calif.

A process for treating a metal sur- face to promote adhesion thereto comprising contacting with an adhe- sion promotion composition compris- ing 0.1 to 20% by weight hydrogen

peroxide, a3~ inorganic acid, an or- ganic corrosion inhibitor, and a sur- faetant to form a microroughened conversion-coated surface, and ad- hering a material to the microrough- ened conversion-coated surface.

ELECTROLESS COPPER P L A T I N G PROCESS U.S. Patent 5,801,100. Sept. 1, 1998 C-Y. Lee arm T-II. Huang, assignors to Industrial Technology Research Institute, Hsinchu, Taiwan

A method for fabricating a copper containing integrated s tructure within an integrated circuit compris- ing providing a substrate layer, forming a nickel containing conduc- tor layer over the substrate layer; and forming upon the nickel con- taining conductor layer a copper con- taining conductor layer, where the copper containing conductor layer is employed within a copper contain- ing integrated circuit inductor struc- ture within the integrated circuit.

STABIL IZED C L E A N I N G SOLVENT U.S. Patent 5,801,136. Sept. 1, 1998 R.G. Henry, assignor to Advanced Chemical Design Inc., Euclid, Ohio

A solvent mix tu re hav ing an ozone depletion factor of less than 0.08, for use in a vapor degreasing system, consisting essentially of 80 to 96.8~ by volume, chlorobro- momethane; about 3.2 to 20.0% of a mixture of stabilizers consisting essentially of nitromethane, 1,2- butylene oxide, and 1,3-dioxolane, the mixture of stabilizers being effective to inhibit the release of bromine into the atmosphere from the chlorobromomethane.

C H R O M i U M - F R E E C O N V E R S I O N C O A T I N G U.S. Patent 5,801,217. Sept. 1, 1998 E.A. Rodzewich et al., assignors to BetzDearbort~ Inc., Trevose, Pa.

A chromium-free conversion coat- ing composition consisting essen- tially of a diglycidyl ether of Bis- phenol A, a silicon compound containing a hydrolyzable group, a fiuoroacid selected from the group consisting of fluorotitanic acid and fluorozirconic acid, and water.

ZERO-VOC A O U E O U S D I S P E R S I O N U.S. Patent 5,801,219. Sept. I, 1998 A.L. Neymark and D.J. Miklos, assignors to Bee Chemical Co., Lansing, Ill.

A neutralized aqueous dispersion of an acid-modified polyolefin and an adduct of a monoepoxide with a polymeric acid.

116 Metal Finishing