lytic film: and electroleasly metal1 zing the re-exposed portion of the circuitry layer and the exposed portion of lhe first resin.

Coating of Internal Surfaces in Tanks and Pipe Systems U.S. Patent 5545,433. Aug. 13. 1996 L.I. Aanestad, Sandnes, Norway

A method for applying a metal precipita- tion coating to the internal. cleaned surfaces of tanks and pipe systems comprising tilling with an aqueous solution of an acid, cleaning by heating the acid solution, circulating it and removing particulates from the hot acid solu- tion; neutralizing the acid solution at the end of the cleaning step; removing about one- fifth of the volume of neutralized solution and replacing it with a concentrated metal plating solution; and circulating the resultant solution to coat the internal surfaces of the tank or pipe system with metal.

Method for Coating a Metal Cookware U.S. Pafeni 5,545,439. Aug. 73, 1996 C-C. Deng and T-H. Thai, Koahsiung Hsien, Taiwan

A method of coating an article of metal cookware having a cooking surface, com-

prising cleaning; f01- nins &I bcratcbre\i\- tant oxide film on the cooking ~~ri’acc by anodic oxidation: roughening the scralcll- resistant oxide film hy blasting to form a roughened surface thsreon, \aid roughened surface having valle\,s extending into the cooking surface: and applying an antistick fihn of fluorocarbon resin on the rouph- ened surface.

Plated Plastic Fuel Tank U.S. Patent 5,547,096. Aug. 20, 1996 H. Kleyn, assignor to K/eyn Die Engravers Inc.. Jenison, Mich.

A plated, polymeric fuel tank shell, com- prising a first outer shell half: a second outer shell half mating with the first outer shell half to define a space for the contain- ment of an inner shell; and a metallic plat- ing on a surface of both shell halves, said metallic plating including a layer of copper, a layer of nickel, and a layer of chrome.

Thin-Film Patterning U.S. Pafent 5,547,557. Aug. 20, 1996 H. Asai and Y Omata, assignors to Matsushita Electric industrial Co. Ltd.. Osaka-fu, Japan

A process tor Jor-min? XI electroconduc- rive thin-film pattc’m o11 .m insulating sub- strate, comprising t’onning a metal layer hav- ing a IOU melting point OII the insulating substrate: patterning the metal layer to form a patterned low melting point metal layer; forming a base electrode layer for electroplat- ing the electroconductive film pattern over the substrate having the patterned low melt- ing point metal layer: selectively forming a photoresist layer by photolithography on por- tions having the patterned low melting point metal layer; forming the electroconductive film pattern by electroplating on portions other than the portions having the photoresist layer; removing the photoresist layer; and heating the substrate to a temperature above the melting point to melt the patterned low melting point metal layer, thereby enabling it to be removed.

Electroplating Nonconductive Surfaces U.S. Patent 5,547,558. Aug. 20, 1996 Y Sakamoto and T Tanimura. assignors to MEC Co. Ltd., Amagasaki, Japan

A process for electroplating a through- hole inner wall of a printed wiring board

m CUSTOM FABRICATIONS Anodizing systems, Automated hoist systems, Chemfilm lines, Cleanmom pass throughs, CPVC tanks and liners, Ekxtruless nickel lines, Environmental enclosures, Etching lines, Exhaust hoods, Fume scrubbers, Laboratory hoods, Polypropylene tanks, PVC tanks and liners, PVDF tanks and liners, Secondary containment sumps, Selective gold plating units, Stainless steel tanks, Titanium tanks, and Wet stations.

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METAL FINISHING ?? APRIL 1997 103

having a conductive metal layer, compris- ing providing an aqueous dispersion of spe- cific carbon particles containing graphite particles with an average particle diameter of 2 pm or less or carbon black particles with an average diameter of 1 pm or less, or both and 0.05-5% of an inorganic binder; applying the aqueous dispersion to deposit a layer of specific carbon particles in the through-holes; dipping the printed-wiring board in a strong acidic aqueous solution having a pH of 3 or lower; removing a specific carbon particle layer attached to the surface by etching the metal layer to remove a thickness of 0.01-5.0 pm; and electroplating using the conductive metal layer and the specific carbon particle layer as a conductive layer.

Process for Plating Metals U.S. Patent 5,547,559. Aug. 20, 1996 P. Kukanskis et al, assignors to MacDermid Inc., Waterbuy, Conn.

A process for electroplating surfaces comprising activation; cathodical electro- cleaning; and electroplating.

Process for Denaturing Paints U.S. Patent 5,547,587. Aug. 20, 1996 T MO/Z et a/., assignors to He&e/ KGA, Duesseldorf Germany

In a process for denaturing and coagu- lating organic coating materials including water-based paint particles, by contacting the organic coating material with circuit water in a wet separator for spray painting installations, containing a coagulating ef- fective amount of coagulants to denature and coagulate the coating material, the im- provement which comprises maintaining hardness of the circuit water to keep the denatured and coagulated coating materials suspended, wherein the coagulant contains as an active constituent at least one com- position selected from the group consisting of layer silicates, waxes, and ethylene/ acrylic acid copolymers.

Color/Clear Composite Coating Platinum Electroforming Bath U.S. Patent 5,547,757. Aug. 20, 1996 U.S. Patent 5,549,738. Aug. 27, 1996 S. Swafup et a/., assignors to PPG Industries Inc., K. Kitada and S. Yarita, assignors to Electroplating Pittsburgh Engineers of Japan Ltd., Japan

A process for applying a composite coat- ing to a substrate, which comprises apply-

A platinum electroforming bath consist- ing of a hexahydroxyplatinate of hydrogen

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ing a colored film forming composition to form a basecoat and applying to the basecoat a clear film forming composition to form a transparent topcoat over the basecoat, characterized in that the clear film forming composition is a crosslinkable composition comprising a polyepoxide and a polyacid curing agent.

Waterborne Primer U.S. Patent 5348,016. Aug. 20, 1996 R.M. Provenzola, assignor to Tremco Inc., Beachwood, Ohio

A waterborne polymeric coating compo- sition, comprising a blend of polymeric resins and pigments dispersed in a water- based solvent system, said resins including a water-soluble or water-miscible polyure- thane and a water-soluble or water-miscible acrylic polymer.

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METAL FINISHING ?? APRIL 1997