Air Entrapment of Overspray U.S. Patent 5,690,740. Nov. 25, 1997 W.C. Smith, Potomac, Md.

An air chisel apparatus for containing overspray associated with the spraying of

a work surface.

Pickl ing Sta in less Steel U.S. Patent 5,690,748. Nov. 25, 1997 D. Henriet, assignor to Ugine Aciers de Chatillon et Gueugnon, Gueugnon, France

A process for pickling a stainless steel prro~auCt comoftgm~ a fid~im~'oatn'na~n~ a redox potential and consisting essentially o f FtF kt an amount of 6~) g/L.. to 150gt%: dissolved Fe 3÷ ions as the pickling agent; at least one oxidizing agent selected from the group consisting of ozone, chlorine, water

permanganates, peroxyurea, percarbonic acid, -pen~,r,"c~ ~,ccid, "pef'~zo'c~ ~c?g, T~,- sulfuric acid, perphosphoric acid, periodic

ate, and magnesium percarbonate; and wa-

ter; and inserting the stainless steel into the pickling bath wherein the redox potential is monitored and maintained between +100 and +350 mV.

U.S. Patent 5,690,750. Nov. 25, 1997 M. Inada et al., assignors to KK Toshiba, Kawasaki, Japan

A method of cleaning a metal, elec- tronic, semiconductor, ceramic, glass, plas- tic, optical or surface-treated part compris- ing the step of cleaning the part in an immersion bath with a cleaning agent con- sisting essentially of an inflammable sol- veto ~diet:Xe~h "~rom "~ne grotfo z:omd~s'/m-~ di hydrocarbons and silicones, wherein the c}eafft~g is carried ot~t "m an a~mosphere of an inactive vapor resulting from thermal vaporization of perfluorocarbon, such that the inactive vapor condenses on the part,

point of the perfluorocarbon, forms a mis-

wherein the blend washes off the surface of

part.

Vapor Phase Cleaning U.S. Patent5,690,751. Nov. 25, 1997 P. H6 et aL, assignors to The Dow Chemical Co., Midland, Mich. and EMO Obefflachentechnik GmbH, Bretten-Golshausen, Germany

articles in the vapor phase of an organic solvent having a flash point of 40 to IO0°C comprising feeding solvent vapor into a cleaning chamber, wherein an ab- solute pressure of 200 mbar or less is maintained and cleaning at a temperature at or above the flash point of the organic solvent and a pressure of 200 mbar or less.

Gm'vanezeo" Co=d-Rot'fed ~"lteet Sheet u s Patent 5,690,755 Nov 25, 1997 N Yoshinaga eta/, assignors to Nippon Steel Corp., Fo~yo

vanized cold-rolled steel sheet having ex-

properties at room temperature.

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