enhance corrosion resistance of its surface, which comprises coating the aluminum surface with chromate; ex- posing the chromate-coated alumi- num surface to an aqueous polyure- thane solution; and forming a polyurethane film on the chromate conversion coated aluminum surface.

GLOBAL POSITIONING FOR A PAINT SPRAYER U.S. Patent 6,074,693. June 13, 2000 C.D.H. Manning, assignor to Trimble Navigation Ltd., Sunnyvale, Calif.

A method for geographically marking a drawing pattern, comprising deter- mining a global position sys tem (BPS)-based location of a nozzle; re- ceiving print data for a drawing pat- tern; using a geographical reference location for converting the print data to geographical mark locations corre- sponding to the drawing pattern; de-

tecting a location match when said GPS-based location matches one of the geographical mark locations; and depositing a marking material onto a surface from the nozzle when the lo- cation match is detected.

ALKYD P A l m U.S. Patent 6,075,088. June 13, 2000 J. Bracken, assignor to Fina Research S.A., Feluy, Belgium

High-solids air-drying or semidrying alkyd paints comprising as binder, a conventional air-drying or semidry- ing long-oil or medium-oil alkyd res- in; as reactive diluent, an oligomer prepared by the reaction of a polyol, fatty acids, and a polyisocyanate; at least one drier; and pigments, fillers, and auxiliaries in sufficient amounts to limit VOCs to at most 250 g/L.

VEHICLE PAINTING SYSTEM HAVING A PAINT RECOVERY MECHANISM

U.S. Patent 6.077,354. June 20, 2000 D.E. Kaneski and D.R. Powell, assignors to Chrysler Corp.,JAuburn Hills, Mich.

An automotive vehicle painting system comprising plural paint supply sources wherein each source has a different col- oration; a paint applicator mechanism for applying paint from selected ones of the sources to individual vehicles as the vehicles pass sequentially through the system; and means for recirculating unused paint to the respective paint supply sources.

Off ICE N i l ELECTI3OLY11C TREATMENT OF PRINTED ClllCUff BOAROS U.S. Patent 6,077,359. June 20, 2000 D.T. Baron and R. Schneider, assignors to Atotech Deutschland GmbH, Berlin, Germany

A method of treatment of printed cir- cuit boards or conductor films with a treatment liquid comprising trans-

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