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.

ENHANCING SOLDERARILITV OF A SURFACE

U.S. Patent 5,935,640. Aug. 10, 1999 D. Ferrier and E. Yakobson, assignors to MacDermid Inc., Waterbury, Conn.

A process for enhancing the sol- derability of a surface, which com- prises immersion plating silver onto the surface prior to soldering and soldering directly upon the silver plate.

REDUCING SEED DEPOSlTlON IN ELECTROLESS PLATING

U.S. Patent 5,935,652. Aug. 10, 1999 A.P. Angelopoulos et al., assignors to IBM Corp., Armonk, N.Y.

A method of reducing the amount of seed deposited on a dielectric surface comprising providing a workpiece coated with a poly- meric dielectric layer.

THERMALLY RELEASARLE BARRIER COATING

U.S. Patent 5,935,655. Aug. 10, 1999 S.J. Beleck, assignor to Henkel Corp.

A liquid coating composition suit- able for applying to a solid surface for producing a thermally releas- able barrier coating on the sur- face.

SEAL FOR ANODIZED MECAL

SURFACES

U.S. Patent 5,935,656. Aug. 10, 1999 T. Koerner et al., assignors to Henkel KGA, Dusseldorf; Germany

A process for sealing an anodized metal surface wherein the anod- ized metal is contacted for be- tween 0.5 and 2 min per microme- ter of anodized coating thickness with an aqueous solution, which has a temperature between 75°C and its boiling point, has a pH of

5.5 to 8.5, and comprises 0.0001 to 5 g/L of one or more metal ions selected from the group consisting of alkali metal and alkaline earth metal ions; and 0.0005 to 0.5 g/L of one or more organic acids se- lected from the group consisting of cyclic polycarboxylic acids hav- ing 3 to 6 carboxyl groups, phos- phonic acids, and polyphosphino- carboxylic acids, the aqueous solution containing a larger quan- tity of the metal ions than is re- quired for complete neutraliza- tion of the acids.

MULTlPLE NOZZLE PAINT SPRAY APPARATUS

U.S. Patent 5,935,657. Aug. 10, 1999 H. Melendez, Fair Oaks, Calif:

A method of painting using a mul- tiple nozzle paint spray appara- tus.

CONTINUOUS COATING APPARATUS

U.S. Patent 5,935,658. Aug. 10, 1999 D. Clerc, assignor to Sollac, Puteaux, France

Process for application of an or- ganic coating on a moving metal- lurgical product from a bath of liquid organic material contained in a vat, the transfer of material onto the product being accom- plished in a coating zone, wherein in order to eliminate air bubbles an ascending current is generated in the liquid organic material bath between the coating zone and an element, which generates the ascending current so as to convey air bubbles in the bath to the vicinity of the bath surface and cause their bursting.

RADlATlON CURING OF POWDER COATINGS

U.S. Patent 5,935,661. Aug. 10, 1999 K.M. Biller and B.A. MacFadden, assignors to Herberts Powder Coatings Inc., Hilliard, Ohio

A process for obtaining a cured powder coating on the surface of a workpiece comprising providing a photopolymerizable composition; blending the composition as sub- stantially dry solid powder; and depositing powder onto the sur- face of a workpiece; and curing.

TWO-COMPONENT COATING COMPOSITIONS

U.S. Patent 5,935,710. Aug. 10, 1999 M. Hoenel et al., assignors to Vianova Resins GmbH, Mainz- Kastel, Germany

A coating composition comprising one or more resins having amino- reactive groups; one or more poly- amine curing agents; one or more aminourethanes; optionally, pig- ments, filters, one or more organic solvents, water and conventional additives; and one or more water- dilutable or water-soluble poly- urethane resins.

SEMICONDUCTOR LEADFRAME

U.S. Patent 5,935,719. Aug. 10, 1999 D.C. Abbott, assignor to Texas Instruments Inc., Dallas

A leadframe structure, which comprises a leadframe formed from one of copper or copper- based material; and a coating of palladium over the leadframe; and a layer of 10 to 95% copper by weight and the remainder palla- dium deposited between the lead- frame and the coating of palla- dium.

70 Metal Finishing