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.,20231

Blasting Apparatus U.S. Patenf5,271,188. Dec. 21, 1993 7: Yoshikawa, assignor to Sony Corp., Japan

A blasting apparatus for abrasion treat- ments, comprising a number of work tables located at uniform intervals in the longitu- dinal direction and arranged to releasably hold workpieces independently of each other; a work table feed means arranged to reciprocate the work tables simultaneously in the longitudinal direction; and blast nozzles each arranged to blast a mixture of high pressure gas and fine powder.

Deoxidizer for Aluminum U.S. Patent 5,271,&N. Dec. 21, 1993 F.A. Muller and D.J. Tomlinson, assignors to Elf Atcchem North America Inc., Philadelphia

An etchantideoxidizer solution for alu- minum comprising water, ferric sulfate, nitric acid, and a hydrofluoric acidlphos- phoric acid component selected from the group consisting of hydrofluoric acid or fluoride salts and phosphoric acid, or a fluorophosphoric acid.

Selectivb Plating Apparatus U.S. Patent 5271,822. Dec. 2f, 1993 E.R. No/an and C. WC. Lin, assignors fo Microelec- tronics and Computer Technology Corp., A&in, Texas

A method of selectively electroplating a metallic coating onto a plurality of closely spaced electrical contacts.

Vacuum Coating Apparatus U.S. Patent 5,273,836. Dec. 28, 1993 W Heil, assignor to Leybold AG, Hanau, Germany

Vacuum coating apparatus, comprising a rotatably mounted shaft and a substrate table mounted on a portion of the shaft.

Zinc-Chromium Alloy Plated Sheet U.S. Patent 5273,643. Dec. 28, 1993 K. Hasegawa et a/., assignors to Kawasaki Steel Corp., Japan

A method of producing a zinc-chromium alloy plated steel sheet with excellent plating adhesion comprising using an acid plating bath containing zinc and chromium in a total amount of at least about OSM within the dissolution rgnge, and 0.1-30 g/L of at least one nonionic organic additive having at least a triple bond, at a

bath temperature of 2%70°C and pH of 1.c4.0 with a current density of N-200 Aldm*.

Molten Salt Descaling of Metal Strip U.S. Patent 5,272,798. Dec. 28, 1993 J.M. Cole and CM. Bessey, assignors to Kolene Corp., Detroit

A method for descaling a metal strip having upper and lower surfaces traveling at a predetermined speed in an annealing line, comprising providing a descaling product in molten form with a consistency sufficient to be sprayed through a nozzle device, passing the metal strip to be descaled through a spray box; directing the molten descaling product against one of the surfaces of the metal strip in the spray box of an amount and time sufficient to descale the surface of the metal strip.

Tin-Electroplated Steel Strip U.S. Patent 5,275,716. Jan. 4, 1994 K. Kojima et al, assignors to NKK Corp., Tokyo

A method for manufacturing a tin- electroplated cold-rolled steel strip, which comprises the steps of degreasing then subjecting to a continuous tin-electroplat- ing treatment to form, on at least one surface of the strip, a tin-electroplating layer having a weight within a range of 0.1-2.8 g/m* and then temper-rolling.

Coating For Fasteners U.S. Patenr 5,275,892. Jan. 4, 1994 J. Hyner and B.S. Lewis, assignors to Whyco Chromium Co. Inc., Thomaston, Conn.

A corrosion-resistant fastener having a ferrous metal substrate and, in sequence, a first layer of a nonstrike nickel or nickel- based alloy of at least 0.00005 in. thick- ness; a second layer of a zinc-based alloy containing zinc alloyed with nickel, cobalt, iron or combinations thereof; a third layer of zinc; a fourth layer of copper; a fifth layer of nickel; and a sixth layer of chromium or metallic chromium substitute.

Powder Spray Booth U.S. Patent 5,277,713. Jan. 11, 1994 S. Gefain and B. Dinkel, assignors fo Gema Volsfafic AG, St. Gal/en, Switzerland

A cabin for electrostatically spray COat-

ing objects disposed therein with powder.

Sputtering Apparatus U.S. Patent 5,277,778. Jan. 11, 1994 C. Daube et al, assignors to Leybold AG, Hanau, Germany

A method and apparatus for coating components or shapes by cathode sputter- ing.

Colored Anodic Film U.S. Patent5,277,982. Jan. 11, 1994 M.A. Jozefowicz, assignor to A/can lnfernational Ltd., Montreal

A process for producing anodic films exhibiting colored patterns.

Brush Plating Process U.S. Patent5,277,785. Jan. 11, 1994 ES. Van Anglen, Quakertown, Pa.

A method of selective plating of a hard chromium coating upon a conductive base material comprising a lead-base electrode having a porous polymeric material resis- tant to attack by chromic acid covering the electrode surface and a polymeric brush material covering the porous plastic mate- rial.

Noncyanide Gold Electroplating U.S. Patent5,277,790. Jan. If, 1994 R.J. Morrissey, assignor to Technic Inc., Cransfon, RI.

A method of electroplating gold or gold alloys on a substrate comprising preparing a cyanide-free electroplating solution con- taining gold in the form of a soluble sulfite complex, an added source of sulfite and/or bisulfite ion, a supporting electrolyte, an organic polyamine or mixture of polyam- ines, and an aromatic organic nitro com- pound, wherein the solution has a pH of less than 6.5.

Treatment for Spent Electroless Plating Baths U.S. Patent 5,277,817. Jan 11, 1994 N.M. Marfyak et al, assignors to Monsanto Co., St. Louis

A method of removing polyvalent borate or orthophosphite anions from an aqueous solution having dissolved metal associated with neutral zwitterions and/or monovalent anions, said method comprising removing substantially all of the metal by solvent extraction to provide a raffinate solution substantially devoid of the metal, and

104 METAL FINISHING . FEBRUARY 1995