COMPOsmONu.s. Patent 5,868,819. Feb. 9, 1999D.J. Guhde et al., assignors to MetalCoatings International Inc.,Chardon, OhioA chrome-free, stable, water­reducible coating composition ofaqueous medium for applicationto and heat curing on a substratefor providing corrosion protectionthereto, said composition com­prising water t~ provi.d.e the aqu~­aUS medium; hIgh-bOlhng orgamcliquid; particulate metal; thick­ener; and water-reducible, epoxy­functional silane binding agentcontributing from 3 to 20% byweight of the total compositionweight.

AQUEOUS COAnNG COMPOSmON

u.s. Patent 5,868,820. Feb. 9, 1999W.J. Claffey, assignor to PPGIndustries Inc., Pittsburgh

An aqueous metal surface treat­ment composition comprising atleast one polyhydroxy-functionalcyclic compound selected from thegroup consisting of polyhydroxyphenolic compounds and hetero­cyclic nitrogen-containing com­pounds having polyhydroxy func­tionality; phosphate ions; at leastone oxidizer-accelerator; and wa­ter.

PAINT GUN INCORPORAnNG ALASIR DIVICIU.S. Patent 5,868,840. Feb. 9, 1999R.J. Klein II and D.L. Sevey,assignors to The University ofNorthern Iowa Foundation, CedarFalls, Iowa

A hand-held spray gun for apply­ing a liquid coating to a surfacecomprising a light generating de­vice disposed within the interiorof the housing, wherein the lightgenerating device includes alight-emitting arrangement forcommunicating a light beam exte­riorly of the housing and towardthe surface to be coated; a lightreceiving device mounted to thehousing and including a light re­ceiving arrangement having anexposure exteriorly of the housingfor receiving light from the light­emitting arrangement reflectedfrom the surface to be coated; andan operator interface intercon­nected with the light receiving de­vice for conveying information tothe operator pertaining to appli-

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November 1999

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