PATENTS GRANTED In the Metal 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, D.C. 2023 1.

Hot-Dip Coating Process U.S. Patent 5,478,600. Dec. 26, 1995 M. Takeda et ab, assignors to Daido Stee/ Sheet Corp., Amagasaki, and S-STEM Ltd., Nagoya, both of Japan

A process for making an alloy-coated, ferrous-based article, which consists essen- tially of dipping the article into a first bath of molten zinc to form an undercoat com- prising iron and zinc; removing the under- coated article from the first bath; dipping the undercoated article into a second bath consisting essentially of 20-70% of molten aluminum, from 0.54% of silicon and the balance zinc, to form an outer coating and removing the alloy-coated article from the second bath.

Waterborne Coating Composition U.S. Patent 5478,601. Dec. 26, 1995 GR. Larson et ab, assignors to Rohm and Haas Co., Philadelphia

A method of improving the chemical resistance of a coating comprising forming a waterbome coating composition by ad- mixing an aqueous dispersion of a polymer and an aqueous dispersion of a polyisocy- anate bearing at least two isocyanate groups; applying the coating composition to a substrate; and curing the coating com- position.

Metal with Enhanced Paint Adhesion U.S. Patent 5,478,655. Dec. 26, 1995 A. Sabata and WJ. van Ooij, assignors to Armco Inc., Middletown, Ohio

A painted metal having improved paint adhesion, comprising a metal sheet includ- ing a composite coating with an inorganic and an organic layer; metal sheet; the inor- ganic layer including at least one of a sili- cate or an aluminate, and the organic layer including siloxane and a resin paint, whereby the siloxane forms an adherent bond between the paint and the metal sub- strate.

Coating Simulating Brass U.S. Patent 5,478,659. Dec. 26, 1995 S. R. Moysan and Ft. W. Sugg, assignors to Baldwin Hardware Corp., Reading, Pa.

An article comprising a metallic sub- strate having disposed on at least a portion of its surface a multilayer coating simulat- ing brass comprising a layer comprised of semibright nickel; a layer comprised of bright nickel; a metallic layer comprised of substantially amorphous nickel-tungsten- boron alloy containing at least about 0.05 weight percent boron; and a top layer com- prised of zirconium compound or titanium compound.

Coating Simulating Brass U.S. Patent 5,478,660. Dec. 26, 1995 SR. Moysan and R.W. Sugg, assignors to Baldwin Hardware Corp., Reading, Pa.

An article comprising a metallic sub- strate having on at least a portion of its surface a multilayer coating simulating brass comprising a layer comprised of nickel; a metallic layer comprised of sub- stantially amorphous nickel-tungsten-bo- ron alloy containing at least about 0.05 weight percent boron; and a top layer com- prised of zirconium compound or titanium compound.

Paint Spray Booth U.S. Patent 5,480,349. Jan. 2, 1996 T. Kotta, assignor to Ford Motor Co., Dearborn, Mich.

A paint spray booth including air supply having a fan motor and improved apparatus for controlling the speed of air in a first area and a second area of the booth.

Stabilizer for Electroless Plating U.S. Patent 5,480,477. Jan. 2, 1996 N. Feldstein and 7X. Lancsek, assignors to Surface Technology Inc., Trenton, N. J.

A composition of matter useful for elec- troless plating, which comprises a solvent, a metal salt, and electroless plating reduc- ing agent, a complexing agent and/or chelating agent, and a compound compris- ing of cobalt in the cobaltic oxidation state.

Etch Monitor U.S. Patent 5,480,511. Jan. 2, 1996 S.G. Barbee et al, assignors fo IBM Corp., Armonk, N. Y

A contactless method for in-situ chemi- cal etch monitoring of an etching process

during etching of a workpiece with a wet chemical etchant.

Brushless Electrodeposition Apparatus U.S. Patent 5,480,52&?. Jan. 2, 1996 P. Bischoping et ab, assignors fo Xerox Corp., Stamford, Conn.

An apparatus for depositing metal on a mandrel, which provides a brushless elec- trical current continuity between the man- drel and a current source, comprising an anode electrode; a cathodic mandrel, spaced apart from the anode electrode, wherein the mandrel defines a space that is partially or fully filled with a first conduc- tive liquid in electrical contact with the mandrel; a second conductive liquid elec- trically isolated from the anode electrode; connecting means for electrically connect- ing the first conductive liquid and the sec- ond conductive liquid; and a rotation de- vice, coupled to the mandrel, for rotating the mandrel during deposition of metal thereon.

Vacuum Coating Mask U.S. Patent 5,480,530. Jan. 2, 1996 J. Zejda, assignor to Leybold AG, Hanau, Germany

A mask for processing a disk-shaped substrate having a thickness, an annular marginal portion defining an outside diam- eter of the substrate, and a centra1 circular hole defining an inside diameter of the substrate, said mask comprising a flat plate having an essentially circular opening de- fined by an inwardly facing cylindrical wal1 with a diameter substantially the same as the outside diameter of the substrate.

Target for Cathode Sputtering U.S. Patent 5,480,537. Jan. 2, 1996 M. Weigert et al, assignors to Degussa AG, Frankfuti am Main, Germany

An oxide-ceramic target for cathode sputtering consisting essentially of a par- tially reduced indium oxide-tin oxide mix- ture.

Sputtering Target U.S. Patent 5,480,532. Jan. 2, 1996 M. Schlott et al., assignors to Leybold Materials, Hanau, Germany

80 METAL FINISHING ?? OCTOBER 1996