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.

Airless Spray Gun U.S. &dent 5,660,332. Aug. 26, 1997 D.H. Carey and J.D. Geberfh, assignors fo Titan Tool Inc., Oakland, IV. J.

A spray tip guard for hydraulically op- erated airless spray gun.

Blasting Nozzle U.S. Patent 5,660,560. Aug. 26,1997 7X Lehnig, assignor to Co/d Jet Inc., Cincinnati

A nozzle for a cryogenic particle blast system.

Electroless Gold Plating Solution U.S. Patent 5,660,619. Aug. 26, 1997 H. Wachi and Y Otani, assignors fo Electroplating Engineer of Japan Ltd., Tokyo

An electroless gold plating solution con- taining a gold alkali metal cyanide, a bo- ron-based reducing agent, an alkali metal hydroxide as a pH controller, and a lead compound, wherein 0. I to IO g/L of a chelating agent and 5 to 99 m&/L of sodium nitrobenzenesulfonate, p-nitrobenzoic acid, or mixtures thereof are added, whereby the sodium nitrobenzenesulfonate or p-ni- trobenzoic acid is added as an oxidant to control the action of the reducing agent to reduce undesirable spread of plated areas.

Removing Sputtered Deposits U.S.Patent 5660,640. Aug. 26, 1997 D.r? Laube, assignor to Joray Corp., Phoenix

A method for the removal of deposited material from equipment components used in a vapor deposition process comprising immersing the components in an aqueous bath 5 to 8% by volume of ammonia hy- droxide and 3X to 42% by volume of hy- drogen peroxide; maintammg at a temper- ature below ambient during immersion: removing the components from the bath; subjecting to an acid etch; and applying a rinsing fluid.

Sputtering Process U.S. Patenf 5,660,696. Aug. 26, 1997 J. Moon, assignor to Samsung Electronics Co. Ltd.. Suwon. Republic of Korea

A method for forming titanium lines by sputtering.

Electroplating Apparatus U.S. Pafent 5,660,699. Aug. 26, 1997 T Saito et al, assignors to Kao Corp., Tokyo

An electroplating apparatus comprising a cathode electrode for supporting a sub- strate; a body disposed below the cathode for moving upwardly and Idownwardly rel- ative to the cathode and a clamp mounted on the body and adapted to clamp a periph- eral edge portion of the substrate against the cathode; and a pressure source for sup- plying compressed air through a first feed conduit so that the body and clamp are moved downwardly with respect to the cathode to clamp the substrate.

Composite Plating Process U.S. Patenf 5,660,704. Aug. 26, 1997 Y: Murase, assignor to Yamaha Hatsudoki KK, Shizuoka-ken, Japan

A method for forming a plating coating having a nonhomogeneous distribution of a dispersed substance consis.ting essentially of placing a hollow cylimlrical electrode having an end inside a work having a cy- lindrical inner surface. wherein an inner passage of plating liquid i:; formed inside the hollow cylindrical electrode, and an outer passage of plating liquid is formed between the hollow cylindrical electrode and the cylindrical inner surface of the work; permitting a plating liquid contain- ing a dispcrscr! substance to flow at a plat- ing liquid flow rate of I .O to 70 rn/sec through the outer passage and inner pas- sage; impressing a voltage between the work and electrode to <rive a current den- sity of 20 to 400 A/dm?therebetween; and after initiating deposition of a plating coat- ing changing the plating liquid flow rate, or the plating liquid flow rate and the electric current density, at intervals 1.n continuously such that the plating liquid flow rate is increased to decrease the ;amount of dis- persed substance to producs an outwardly nonhomogeneous distribution of dispersed substance.

Method of Repairing a Steam- Generator Tube by Electroplating U.S. Pafent 5,660,705. Aug. 26, 1997 B. Michaut, assignor to Framatome. Courbevioe, France

A method of repairing a steam-generator tube crimped in a tube plate lining, to repair a wall of the tube having cracks resulting from stress corrosion and to prevent leaks of primary cooling through the wall of the tube, said method consisting of electroplat- ing an inner surface of the tube with a rnetal layer in a region to be repaired, wherein the plated metal layer has a thick- ness greater than 0.5 mm and is a nonmag- netic nickel alloy to allow continuous mon- itoring of leaks by eddy currents.

Electroless Plating Process U.S. Patent 5.660,706. Aug. 26, 1997 8. Zhao and PK Vasudev. assignors lo Sematech Inc., Ausfin, Texas

A method for electric field initiated elec- troless metal deposition,

Zinc-Coated Sheet Steel US. Patent 5,660,707. Aug. 26, 1997 CR. Shastry ef al, assignors lo Bethlehem Steel Corp., Bethlehem, Pa.

A method for improving formability and weldability properties in sheet steel product on which a protective layer is formed on at least one surface thereof, the protective layer being an electroplated or hot-dip coated protective layer and comprising at least zinc by chemically applying an alka- line buffered solution comprising an oxi- dizer to the protective layer to form a zinc oxide layer thereon, said alkaline solution having a pH range of 7 to I I.

Process for Manufacturing a Lead Frame US'. Patent 5,660,708. Aug. 26, 1997 Y Tezuka et a/., assignors to Sumitomo Metal Mining Co. Ltd., Tokyo

A process for manufacturing a lead frame by polishing a blank for a lead frame electrolytically and plating the electrolyti- cally polished surface of the blank with a metal, wherein the electrolytic polishing of the blank is carried out by employing a contactless electrolytic polishing apparatus and applying a direct current with ripples having a frequency of 4.0 to 120 Hz alter- nately to the anode and cathode in an elec- trolytic polishing tank filled with an elec- trolytic polishing solution. so that the time

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Circle 033 on reader information card

for which the blank positioned between both electrodes functions as the anode may be at least 3.3 times longer than that for which it functions as the cathode, whereaf- ter the blank is plated with a metal.

ride, and methacrylamidopropyltrimethyl ammonium chloride w:lth an inorganic ma- terial selected from the group consisting of sodium carbonate and sodium hydroxide to reduce the tackiness of waterborne and/or solventborne paint, wherein the ratio of

Paint Spray Booth Treatment U.S. Patent 5,660,734. Aug. 26, 1997 H.6. Agree and J-C. Chen, assignors to BetzDearbom Inc., Trevose, Pa.

lignosulfonate to cationic monomer unit ranges from lo:90 to 90: 10.

A method of detackifying oversprayed Method for Removing Metals paint, which contacts and is captured by from Waste water circulating in a paint spray booth operation, comprising adding an effective

U.S. Patent 5,660,735. Aug. 26, 1997

amount of a combination of a copolymer of E. Coltriflari and WC. Haze?, assignors to Hazen Research Inc., Golden, Co/c.

lignosulfonate and cationic monomer unit selected from the group consisting of trim- ethylaminoethylacrylate chloride, methy- lacryloxyethyltrimethyl ammonium chlo-

A method for remediation of aqueous feed solutions containing a metal compris- ing precipitating the Inetal from a feed

solution to form a precipitate wherein the metal is selected from the group consisting of aluminum, arsenic, beryllium, boron, cad- mium, chromium, fluorine, nickel, selenium, vanadium, lithium, molybdenum, barium. lead, mercury, silver. copper, zinc, com- pounds thereof, and mixtures thereof; dis- persing discrete fibers in the feed solution to form a product comprising a fiber and pre- cipitate; removing the product from the feed solution to form a treated solution and a recovered product containing the metal pre- cipitate and discrete fibers; and separating the metal precipitate from the discrete fibers in the product to recover the metal.

Process for Electroless Plating U.S. Patent 5660,883. Aug. 26, 1997 Y. Omura. assignor fo Omura Tory0 Co. Ltd., Tottori Prefecture, and Daishin Chemical Co. Ltd., Tokyo

A process for catalyzation in electroless plating comprising forming a coating film comprising chitosan or a chitosan deriva- tive on the surface of a nonconductive sub- stance. and subsequently treating the coat- ing film with a solution of a salt of a catalyst metal to effect chemisorption thereof on the coating film.

Paint Formulations U.S. Pafent 5,661,209. Aug. 26, 1997 N.C.M. Beers et a/., assignors to Shell Oil Co., Houston

A paint formulation comprising at least one long oil alkyd resin and a solvent com- prising at least 90% by weight of one or more linear alkanes having a boiling range between 160 and 250°C.

Drier for a Painting Plant U.S. fafent5,661,912. Sept. 2, 1997 S. Bhahagar et al., assignors to D&r Gmbb’, Stuttgart, Germany

A booth-type drier for a painting plant comprising a booth interior for receiving painted articles to be dried; at least one heating element arranged in the drier; at least one heating gas pipeline; a heating gas duct for flowing hot heating gas there- through; and a valve-type control device for controlling the temperature of the heat- ing element by controlling the flow rate of heating gas.

Powder Coating Sprayer U.S. Patent 5662,272. Sept. 2, 1997 T Buquef et al, assignors to Sames S.A., Meylan, France

A device for delivery of a finely divided coating product to a sprayer comprising a conveyor composed of a tube and a worm screw mounted in the tube for transporting the coating product; a motor coupled to the worm screw for rotating it; and means as-

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