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.

Multilayered Printed Wiring Board U.S. Patent 5,517,75&I. May 21, lYY6 T: liJakamura, assignor to Matsushita Electric industrial Co. Ltd., Osaka, Japan

A method for plating a conductive layer on an insulating resin layer, comprising dry sandblasting abrasives onto a surface of the insulating resin layer; removing the abrasives from the surface of the insulating resin layer, wherein the removing step comprises an ul- trasonic cleaning step; chemically etching the surface of the insulating resin layer subjected to the dry sandblasting treatment; and plating the conductive layer on the surface of the insulating resin layer subjected to the chem- ical etching.

Etching Molybdenum U.S. Patent 5,518,131. May 21, 1996 H.H. Chen et al, assignors to IBM Cop., Armor& N.Y:

A method of etching molybdenum com- prising providing a molybdenum article to be etched with a resistive coating covering all but desired feature areas, which feature areas do not have a resistive coating and are exposed for etching; etching the feature areas with an etchant selected from the group consisting of ferric sulfate and ferric ammonium sulfate; and rinsing with water.

Electrostatic Spraying Apparatus U.S. Patent 5,518,186. May 21, 1996 R. Weinstein, as@wr to Asahi .%ac Cop., Japn

A voltage block device for receiving a conductive coating material at substantially ground potential and for dispensing the coating material to an electrostatic spray head, which, when actuated, is charged by a power supply.

Powder Coating Apparatus U.S. Patent 5,518,344. May 21, 1996 W.S. Miller et al, assignors to Nordson Corp., Westlake, Ohio

An apparatus for unloading powder from a plastic liner within a box-shaped container.

Superabrasive Tool U.S. Patent 5,518,443. May 21, 1996 K.S. Fisher; assignor to Norton Co., Worcester,

Mass.

An abrasive tool comprising a core hav- ing a plurality of peripheral surface sec- tions defined by radial slots in the core; and a plurality of abrasive segments attached to the peripheral surface sections, each abra- sive segment comprising abrasive grain and a bond material.

Water-Based Paint U.S. Patent 5,518,535. May 21, 1996 I?‘T: Boaz, assignor to Ford Motor Co., Dearborn, Mich.

A water-based paint composition, which has excellent adhesion to glass, comprising water-soluble sodium silicate forming 20 to 40% by weight; 5 to 25% water; water- soluble base in an amount sufficient to provide the composition with a pH of at least 10.5; finely divided metal oxide pow- der selected from the group consisting of oxides of copper, iron, nickel, cobalt, and mixtures thereof forming 25 to 40% of the composition and having a particle size less than 7 microns; and zinc oxide forming 2 to 10% of the composition.

Multilayered Printed Wiring Board U.S. Patent 5517,758. May 21, 1996 7: Nakamura, assignor to Matsushita Nectric industrial Co. Ltd., Osaka, Japan

A method for plating a conductive layer on an insulating resin layer, comprising dry sandblasting abrasives onto a surface of the insulating resin layer; removing the abra- sives from the surface of the insulating resin layer, wherein the removing step comprises an ultrasonic cleaning step; chemically etching the surface of the insu- lating resin layer subjected to the dry sand- blasting treatment; and plating the conduc- tive layer on the surface of the insulating resin layer subjected to the chemical etch- ing.

Etching Molybdenum U.S. Patent 5,578,131. May 21, 7996 H.H. Chen et al, assignors to BM Corp., Armonk, N. y.

A method of etching molybdenum comprising providing a molybdenum ar-

ticle to be etched with a resistive coating covering all but desired feature areas, which feature areas do not have a resis- tive coating and are exposed for etching; etching the feature areas with an etchant selected from the group consisting of fer- ric sulfate and ferric ammonium sulfate; and rinsing with water.

Electrostatic Spraying Apparatus U.S. Patent 5,518,186. May 21, 1996 Ft. We&ein,as#ncftoAs&iSunacCq,Japan

A voltage block device for receiving a conductive coating material at substantially ground potential and for dispensing the coating material to an electrostatic spray head, which, when actuated, is charged by a power supply.

Powder Coating Apparatus U.S. Patent 5,518,344. May 27, 7996 KS. Miller et al, assignors to Nordson Corp., Westlake, Ohio

An apparatus for unloading powder from a plastic liner within a box-shaped container.

Superabrasive Tool U.S. Patent 5,516,443. May 21, 1996 KS. Fishec ass&w to A&WI Co., Worcester; Mass

An abrasive tool comprising a core hav- ing a plurality of peripheral surface sec- tions defined by radial slots in the core; and a plurality of abrasive segments attached to the peripheral surface sections, each abra- sive segment comprising abrasive grain and a bond material.

Water-Based Paint U.S. Patent 5,518,535. May 21, 1996 P.T: Boaz, assignor to Ford Motor Co., Dearborn, Mich.

A water-based paint composition, which has excellent adhesion to glass, comprising water-soluble sodium silicate forming 20 to 40% by weight; 5 to 25% water; water- soluble base in an amount sufficient to provide the composition with a pH of at least 10.5; finely divided metal oxide pow- der selected from the group oxides of copper, iron, nickel, cobalt, mixtures thereof forming 25 to 40%

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