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.-VAllIUD SIBLU.S. Patent 5,855,765. Jan. 5, 1999W.A. Morgan, assignor to MetalRecovery Industries Inc., EastChicago, Ind.A process of removing zinc fromgalvanized steel comprising im­mersing in an aqueous electrolytecontaining sodUum or potassiumhydroxide; galvanically corrodingthe zinc in a reaction in whichthere is an anode and a cathode,wherein the zinc serves as the an­ode; and conveying the galvanizedsteel through the electrolyte witha conveyor, which is electricallyisolated from ground and servesas a cathode for the galvanic cor­rosion.

MICIIOftCIIIN8 Of PlUIITID.......AIIDaU.S. Patent 5,855,805. Jan. 5, 1999N.D. Arabinick, assignor to FMCCorp., Philadelphia

A microetchant and cleaning solu­tion for copper-clad substrates inthe production of printed wiringboards, said solution comprisingan alkali metal persulfate; ametal salt component selectedfrom the group consisting ofalkalimetal sulfates and mixtures of al­kali metal sulfates and alkalimetal bisulfates; and sulfuricacid.

TOPCOAnN8 COIIPOSI1IOIlIIU.S. Patent 5,855,960. Jan. 5,1999K. Ohnishi et al., assignors to

Kansai Paint Co. Ltd., Hyogo-ken,JapanA film-forming process, whichcomprises coating a topcoatingcomposition onto a substrate toform a film, said topcoating com­position having been prepared byincorporating an organosilicate.

IWO-COIIPOIUIn' coan...COIIPOSITIOIIU.S. Patent 5,855,961. Jan. 5, 1999M. Haenel et al., assignors toVianova Resins GmbH, Mainz·Kastel, Germany

A process for the production of anaqueous coating composition,which is crosslinkable at roomtemperature, comprising one ormore resins having amino-reae-

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