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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. SURFACE-HARDENED METAL SHOT U.S. Patent 6,018,854. Feb. 1, 2000 Y. Miyasaka, assignor to Fuji Kihan Co. Ltd., Aichi, Japan A method of making surface- hardened metal shot comprising accommodating a predetermined quantity of shot in a first con- tainer of a blasting machine; ac- commodating a predetermined quantity of ferrous metal shot ma- terial in a second container of the blasting machine, the shot having a hardness that is at least equal to that of the ferrous metal shot material; and blasting the shot accommodated in the first con- tainer against the ferrous metal shot material accommodated in the second container at a speed sufficient to increase the temper- ature of the ferrous metal shot material in the vicinity of the sur- face so as to harden the ferrous metal shot material and form sur- face-hardened metal shot. DOMED AIR CAP U.S. Patent 6,019,293. Feb. 1, 2000 J.D. Sweazy and K.C. Floer, assignors to Graco Inc., Minneapolis In an air spray gun comprising a longitudinal axis, a fluid nozzle, and an air cap having a pair of air horns, the improvement compris- ing said fluid nozzle extending through the air cap and compris- ing a frustoconical outer surface and a domed curving inner sur- face. INTERCHANGABLE FEED AIR SPRAY/HVLP SPRAY GUN U.S. Patent 6,019,294. Feb. 1, 2000 R.D. Anderson et al., assignors to Graco Inc., Minneapolis An air atomizing fluid spray gun designed for interchangeable use between gravity feed and pres- sure feed comprising a trigger; a body comprising a boss having first and second sides; a needle; a spray head rotatable between first and second generally diamet- rically opposed positions; and a fluid insert radially insertable into the spray head. ELECTROFORMED STENTS U.S. Patent 6,019,784. Feb. 1, 2000 R.A. Hines, assignor to Electroformed Stents Inc., Stillwell, Kan. A process for producing a stent by electroforming comprising coat- ing a mandrel with a resist; ex- posing portions of the resist to a light pattern so as to form a stent pattern on the mandrel; plating metal onto the mandrel so as to form a stent; and dissolving the mandrel. COATED ABRASIVE U.S. Patent 6,019,805. Feb. 1, 2000 R. Herron, assignor to Norton Co., Worcester, Mass. A coated abrasive comprising a plurality of filamentary abrasive grits adhered to a backing mate- rial, the grits having an essen- tially U-shape with the open ends oriented away from the backing. LIGHT COLORED CONDUCTIVE COATING U.S. Patent 6,019,833. Feb. 1, 2000 M.E. Hartman et al., assignors to PPG Industries Ohio Inc., Cleveland A coating composition containing a resinous film forming binder; a fibrous, carbonaceous material; and a light colored pigment. COATING INNER SURFACES OF TUBES U.S. Patent 6,019,845. Feb. 1, 2000 S. Nakakoshi, Tokyo An apparatus for coating an inner surface of a metal tube with a hot-melt powder paint. ULTRASONIC CLEANING PROCESS U.S. Patent 6,019,852. Feb. 1, 2000 M.P. Pedziwiatr and E.A. Pedziwiatr, Cresskill, N.J. An ultrasonic cleaning method in which ultrasonic energy of differ- ent frequencies is utilized simul- taneously. ZINC PHOSPHATE CONVERSION COATING U.S. Patent 6,019,858. Feb. 1, 2000 M.L. Sienkoski and G.J. Cormier, assignors to Henkel Corp., Gulph Mills, Pa. A process for forming a crystalline zinc phosphate conversion coating on a metal surface that includes contacting with an acidic conver- sion coating solution containing phosphate ions, zinc ions, and hy- droxylamine sulfate; replenishing hydroxylamine sulfate; and con- tinuing contacting the replen- ished coating solution with a metal substrate and replenishing until the coating solution exhibits a sulfate level of no more than 14 g/L. February 2001 117

Surface-hardened metal shot

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Granted in the Meta l Finishing Field P r i n t e d cop ie s o f p a t e n t s a r e f u r n i s h e d b y t h e P a t e n t a n d T r a d e m a r k Off ice for $3 .00 each . A d d r e s s o r d e r s to: C o m m i s s i o n e r o f P a t e n t s a n d T r a d e m a r k s , W a s h i n g t o n , D.C. 20231 .

SURFACE-HARDENED METAL SHOT U.S. Patent 6,018,854. Feb. 1, 2000 Y. Miyasaka, assignor to Fuji Kihan Co. Ltd., Aichi, Japan

A method of mak ing surface- hardened metal shot comprising accommodating a predetermined quant i ty of shot in a first con- tainer of a blasting machine; ac- commodat ing a p r ede t e rmined quant i ty of ferrous metal shot ma- terial in a second container of the blasting machine, the shot having a hardness that is at least equal to that of the ferrous metal shot material; and blasting the shot accommodated in the first con- tainer against the ferrous metal shot material accommodated in the second container at a speed sufficient to increase the temper- ature of the ferrous metal shot material in the vicinity of the sur- face so as to harden the ferrous metal shot material and form sur- face-hardened metal shot.

DOMED AIR CAP U.S. Patent 6,019,293. Feb. 1, 2000 J.D. Sweazy and K.C. Floer, assignors to Graco Inc., Minneapolis

In an air spray gun comprising a longitudinal axis, a fluid nozzle, and an air cap having a pair of air horns, the improvement compris- ing said fluid nozzle extending through the air cap and compris- ing a frustoconical outer surface and a domed curving inner sur- face.

INTERCHANGABLE FEED A IR SPRAY/HVLP SPRAY GUN U.S. Patent 6,019,294. Feb. 1, 2000 R.D. Anderson et al., assignors to Graco Inc., Minneapolis

An air atomizing fluid spray gun designed for interchangeable use between gravity feed and pres- sure feed comprising a trigger; a body comprising a boss having first and second sides; a needle; a sp ray head ro ta tab le be tween first and second generally diamet- rically opposed positions; and a fluid inser t radial ly inser table into the spray head.

ELECTROFORMED STENTS U.S. Patent 6,019,784. Feb. 1, 2000 R.A. Hines, assignor to Electroformed Stents Inc., Stillwell, Kan.

A process for producing a stent by electroforming comprising coat- ing a mandrel with a resist; ex- posing portions of the resist to a light pat tern so as to form a stent pat tern on the mandrel; plating metal onto the mandrel so as to form a stent; and dissolving the mandrel.

COATED ABRASIVE U.S. Patent 6,019,805. Feb. 1, 2000 R. Herron, assignor to Norton Co., Worcester, Mass.

A coated abrasive comprising a plurality of fi lamentary abrasive grits adhered to a backing mate- rial, the grits having an essen- tially U-shape with the open ends oriented away from the backing.

LIGHT COLORED CONDUCTIVE COATING U.S. Patent 6,019,833. Feb. 1, 2000 M.E. Hartman et al., assignors to PPG Industries Ohio Inc., Cleveland

A coating composition containing a resinous film forming binder; a fibrous, carbonaceous material ; and a light colored pigment.

COATING INNER SURFACES OF TUBES U.S. Patent 6,019,845. Feb. 1, 2000 S. Nakakoshi, Tokyo

An apparatus for coating an inner surface of a metal tube with a hot-melt powder paint.

ULTRASONIC CLEANING PROCESS U.S. Patent 6,019,852. Feb. 1, 2000 M.P. Pedziwiatr and E.A. Pedziwiatr, Cresskill, N.J.

An ultrasonic cleaning method in which ultrasonic energy of differ- ent frequencies is utilized simul- taneously.

ZINC PHOSPHATE CONVERSION COATING U.S. Patent 6,019,858. Feb. 1, 2000 M.L. Sienkoski and G.J. Cormier, assignors to Henkel Corp., Gulph Mills, Pa.

A process for forming a crystalline zinc phosphate conversion coating on a metal surface that includes contacting with an acidic conver- sion coating solution containing phosphate ions, zinc ions, and hy- droxylamine sulfate; replenishing hydroxylamine sulfate; and con- t inuing contact ing the replen- ished coat ing solut ion wi th a metal substrate and replenishing until the coating solution exhibits a sulfate level of no more than 14 g/L.

February 2001 117