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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