PATENTS 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.

Corrosion-Resistant Aluminum Coating U.S. Pafent 5554,231. Sept. IO, 1996 J. !N Bibber. assignor to Sanchem Inc., Chicago

A nonchromium aluminum coating composition to provide a protective con- version coating for aluminum or alumi- num alloys, which have not been treated with chromium, comprising as the essen- tial ingredients thereof an alkali metal permanganate and and an aluminum ni- trate wherein the composition is an aque- ous composition having a pH of 2.540, and there is at least 760 ppm permanga- nate and there is O.lO-10.0% aluminum nitrate.

Autodeposition Apparatus U.S. Patent $554,276. Sept. 10, 1996 W.G. Kozak and J.C. Topping, assignors to Henkel Corp., Plymouth Meeting, Pa.

An ion exchange apparatus for maintain- ing a stable bath for an autodeposition composition by periodically separating par- ticular metal ions from the composition.

Method for Dissolving Sludge and Recovering Constituents Therefrom U.S. Patent 5,554,294. Sept. iU, 1996 7: Nishino, assignor to Yukiyoshi Iwamofo, Tokyo

A method for dissolving slightly soluble sludge, which is produced during chemical con-

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Solutions formulated for ultrasonic cleaners, automated spray washers, immersion washers.

A complete line of Zinc and Iron phosphates for metal pretreat applications. A complete line of organic and synthetic rust inhibitors.

Floor cleaners developed for scrubbing machines or manual application.

Coolants for a wide range of metal forming applications.

Custom Formulating Technical Support Deliveries: Prosco is committed to on time delivery

prosco incorporated chemicals for industry 3818 E Prospect l indianapohs. lndma 46203 (31 7) 353-2920 . Fax: 131 7) 353-0733

version coating of metal, consisting of agitating the sludge in an aqueous suspension containing a hydrogen-type strongly acidic cation ex- change resin; ion exchanging metallic compo- nents in the sludge with the resin and adsorbing the metallic components on the resin, dissolv- ing oxyacid components in the sludge into liq- uid phase, and recovering the oxyacid compo nents from the solution and the metallic components from the resin.

Purifying Water-Reducible Paint Waste U.S. Patent5,554,296. Sept. 10, 1996 N. Zakhary, assigrior to Crown Cork & Sea/ Co., Philadelphia

Exolon-ESK offers a full line of abrasive powders for superior performance and outstanding efficiency in your lapping and grinding applications.

MOt’8 chrirw - Silicon Carbide (black and green), Aluminum Oxide (brown and white), Boron Carbide, and Cenum Oxide, avail- able in grades from 280 to 1200 including non-standard sizes, for every application from rough finishing to precision lapping

M~QWt@illlfi8Oll~~- IS0 9002 Certified facilities and the most sophisticated processes ensure the ultimate in quality and consistency. Certified to meet or exceed FEPA, ANSI, JIS and optical standards. wm Relirbil@ - Extensive inven- tories and worldwide distribution gives you the assurance that you have what you need, when you need it. Dedicated Micro Grit Powders division with ceramic engineers provides superior customer service.

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