forming substance of an amorphous silica; and 0.3 to 1% of a flow control agent.

Reactive Coating Composition U.S. /Went 5,580,926. Dec. 3, 1996 M.D. Shalaii et al, assignors to The Shenvin- Williams Co., C/eve/and

A reactive coating comprising an acid- functional compound, an anhydride-func- tional compound, an epoxy-functional compound, and a hydroxy-functional com- pound.

Circuit Board U.S. fatenI5,581,877. Dec. 10, 1996 G.A. Woychik and J.C. Mather, assignors to Allen- Bradadley Co. Inc., Milwaukee

A method of fabrication of a circuit board adapted to receive a single in-line module.

Protective Coating for Copper U.S. Patent 5,582,024. Dec. IO, 1996 R.G. Kobo6 assignor to &r&r Cop, Syracuse, N.Y

A cargo container for storing perishable goods having a refrigeration unit that in-

cludes a copper heat exchanger having a plurality of spaced-apart fins, a uniform black oxide layer covering the outer sur- faces of the heat exchanger that is formed by precleaning and degreasing exposed surfaces followed by immersing in an acid bath to remove unwanted oxides from the exposed surfaces, washing the heat ex- changer with water and then exposing the surfaces to an aqueous oxidizing bath, and further followed by rinsing in successive baths of cold water, hot water, and deion- ized water, an outer coating of nonconduc- tive acrylic paint that is electrocoated over the black oxide preconditioning layer to completely cover the outer surfaces of the heat exchanger with a continuous protec- tive barrier against corrosion.

Particle Spray Apparatus U.S. Patent 5,582,347. Dec. 70, 1996 A.J. Knobbe et al, assignors to Nordson Corp., Westlake, Ohio

A method comprising the steps of direct- ing a flow of air with particles entrained therein toward a workpiece, deflecting at least a portion of the flow of air with

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particles entrained therein with a deflector, electrostatically charging particles en- trained in the flow of air with electrical apparatus, which includes a porous elec- trode sheet disposed in the deflector, and conducting a flow of fluid through the po- rous electrode sheet thereafter through and a porous outer surface area on the deflector.

Ultrasonic Spray Coating System U.S. Patent 5,582,348. Dec. 10, 7996 0.0. Erickson and S.J. Erickson, assignors to Ultrasonic Systems Inc., Amesbuw Mass.

An ultrasonic system for forming a spray, comprising converter means for pro- ducing high-frequency mechanical energy from high-frequency electrical energy; a spray-forming head driven by the high fre- quency mechanical energy; and a first gas director mounted near said spray-forming head, said first gas director for projecting a first stream of gas in a first gas direction toward one of said side surfaces of said spray-forming head, and at an acute angle with the side surface, thereby laterally re- distributing the spray propelled from the atomizing surface with a resultant fan-

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shaped air pattern in a direction substan- tially normal to the atomizing surface.

Blasting Device U.S. Patent 5,582,349. Dec. 10, 1996 16. Boisfure, assignor to C.H. Heist Corp., Baytown, Texas

A hydroblasting spray gun having an on/off safety switch system.

Spray Gun U.S. Patent 5,582,350. Dec. IO, 7 996 M.J. Kosmyna et al., assignors to Ransburg Corp., lndianapolis

A hand-held paint spray gun with top- mounted paint cup.

Pretreatment Washer U.S. Patenl5,562,440. Dec. 10, 1996 M.J. Pascaru, West/ake, Ohio

A segmented pipe for use in commercial fluid distribution systems, comprising a plurality of separately molded short poly- olefin pipe segments, each having an in- gress end and an egress end, the ingress end of a first pipe segment being sized to tele- scopically slip-fit over the egress end of a

second pipe segment, each of the pipe seg- ments having a peripheral locking groove, a pair of arcuate locking collars spanning adjacent locking grooves and nesting rings.

Curl-Resistant Coated Abrasive U.S. Patent 5,582,625. Dec. IO, 1996 HR. Wright et al., assignors to Norton Co., Worcester, Mass.

A coated abrasive comprising a backing material with a tensile strength of at least 4.5 MPa and comprising a staple fiber mat bonded by a thermoset resin with the resin and fibers present in a volume ratio of 1:3 to 30: 1, said backing being isotropic in the plane of the backing and having an abra- sive grain-containing layer adhered to a surface thereof to form a coated abrasive exhibiting dimensional stability.

Conversion Coating for High- Copper Aluminum Alloys U.S. Patent5,582,654. Dec. 10, 1996 F: Mansfeld et al., assignors to The University of Southern California, Los Angeles

A method for treating the surface of an aluminum alloy so as to make the surface resistant to corrosion, comprising deoxidiz-

ing the surface of the alloy; removing sub- stantially all of the copper from the surface of the alloy; contacting the surface with a first solution containing cerium; electri- cally charging the surface while contacting the surface with an aqueous molybdate so- lution; and contacting the surface with the second solution containing cerium.

Coated Abrasive U.S. Patent 5,582,672. Dec. 10, 1996 G.J. Folletf and CA. George, assignors to 3M Co., St. Paul, Minn.

A method of preparing a coated abrasive article that incorporates an energy-cured make coat.

Electrocoating Composition U.S. Patent 5,582,704. Dec. i0, 1996 J.T Vako et a/., assignors to PPG lndusfries Inc., Pittsburgh

A method of electrocoating an electro- conductive substrate, which serves as a cathode in an electrical circuit with an an- ode immersed in an aqueous electrodepos- itable composition containing a cationic water-dispersible resin, comprising passing

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