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.

PICKLING SOLUTION FOR ALUMINUM-STEEL COMPOSlTES U.S. Patent 6,194,369. Feb. 27, 2001 J. Eberhardt et al., assignors to Th. Goldschmidt AG, Essen, Germany

A pickling/activation solution for the pretreatment of aluminum- steel composites prior to dip tin- ning, said solution comprising sulfuric acid, hexafluorosilicic acid, at least one wetting agent, at least one transition metal cation, and nitrate and/or nitrite ions.

POWDER COATlNG COMPOSlTlON U.S. Patent 6,194,525. Feb. 27, 2001 C.E. Ortiz et al., assignors to Ferro Corp., Cleveland

A powder coating composition comprising a low-temperature physical mixture of a powder com- prising a first unsaturated polyes- ter resin and a free radical initia- tor, and a separate and distinct powder comprising a polymeriza- tion promoter.

FULL ADDITIVE PROCESS FOR CIRCUIT BOARDS U.S. Patent 6,195,883. Mar. 6, 2001 A.C. Bhatt et al., assignors to International Business Machines Corp., Armonk, N.Y.

A method of producing fine-line circuitry on a printed circuit board having a planar surface and at least one filled plated through- hole.

PERMEABILITY TESTER U.S. Patent 6,196,055. Mar. 6, 2001 S. Haines, assignor to Textured Coatings of America Inc., Panama City, Flu.

A paint and surface coating air permeability demonstration and testing apparatus.

VACUUM COATING APPARATUS U.S. Patent 6,196,154. Mar. 6, 2001 T. Baumecker et al., assignors to

An air lock for introducing sub-

Leybold Systems GmbH, Hanau,

strates to and/or removing them from a vacuum treatment cham- ber.

Germany

CIRCUlT BOARD ASSEMBLY US. Patent 6,196,876. Mar. 6, 2001 B. Paagman, assignor to Berg Technology Inc., Reno, Nev.

An assembly of shielded connec- tors and a board having plated holes.

SLURRY DELIVERY SYSTEM U.S. Patent 6,196,907. Mar. 6, 2001 S.S. Kahn, Northport, N.Y., assignor to U.S. Dynamics Corp., Amityville, N. Y.

A slurry delivery system for use with a metal polishing machine having a hollow drive shaft.

TOOLS WITH ABRASIVE SEGMENTS U.S. Patent 6,196,911. Mar. 6, 2001 J.B. Preston et al., assignors to 3M Innovative Properties Co., St. Paul, Minn.

A tool for connection to a tool driver for moving the tool in a rotary motion comprising a mounting plate having a first sur- face; and a plurality of abrasive segments attached to the first surface of the mounting plate, at least one abrasive segment made up of a plurality of substantially parallel layers of abrasive parti- cles in a sintered bond material and having a segment face de- fined by a general plane of one of the layers.

ABRASIVE ARTICLE U.S. Patent 6,197,076. Mar. 6, 2001 E.J. Braunschweig, assignors to 3M

An abrasive article for releasable affixation to a surface comprising

Innovative Properties Co., St. Paul,

a substantially flat substrate sheet comprised of a thermoplas-

Minn.

tic polymeric material and an abrasive layer disposed on sur- face.

REMOVING MULTIPLE COATINGS FROM SUBSTRATES U.S. Patent 6,197,124. Mar. 6, 2001 Y. Nakayama, assignor to Kansai Paint-Co., Ltd., Hyogo-ken, Japan

A process for removing multiple layers from a substrate, wherein the multiple layers comprise at least one cured binder layer adja- cent to the substrate, the binder comprising at least about 25% by weight of a cured binder resin.

NICKEL-FREE PHOSPKATING PROCESS U.S. Patent 6,197,126. Mar. 6, 2001 W-A. Roland et al., assignors to Henkel, Duesseldorf; Germany

A process for the production of copper-containing nickel-free phosphate coatings with a copper content of 0.1 to 5% by weight and an edge length of the phosphate crystals of 0.5 to 10 pm on a metal surface selected from the group consisting of galvanized steel and alloy-galvanized steel, which com- prises contacting with a solution containing zinc 0.2 to 2 g/L; cop- per 0.5 to 25 mg/L; phosphate 5 to 30 g/L (expressed as P,O,); at least one member selected from the group consisting of hydroxyl-

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