Class 148/713 - In liquid state

Subclass of Class 148 - Metal treatment
Definition: Process wherein the specified agent is in the liquid state
No. of patents: 22
Last issue date: 08/26/2008

Number	Title	Issue Date
7416623	Method of causing intergranular stress corrosion crack to generate and grow in sample To provide a method for simply and easily causing only IGSCC to initiate and grow in a specimen, which can retain corrosion resistance through passivation, under atmospheric pressure in a short time, an aqueous solution of potassium tetrathionate is brought into con...	08/26/2008
7314688	Method of producing a reflection mask blank, method of producing a reflection mask, and method of producing a semiconductor device A reflection mask blank and a method of producing a reflection mask blank by forming, on a substrate, at least a multilayer reflection film for reflecting exposure light and an absorber layer formed on the multilayer reflection film for absorbing the exposure light....	01/01/2008
6692588	Method and apparatus for simultaneously cleaning and annealing a workpiece The present invention is directed to a method and apparatus for simultaneously cleaning and annealing a plated semiconductor workpiece. A chamber for simultaneously cleaning and annealing a semiconductor workpiece is provided herein. The method according ...	02/17/2004
6689227	Eco-friendly starch quenchants This invention relates to application of eco-friendly starch solution as a quenching medium for heated metal parts fabricated from steel, alloy steel, aluminum and aluminum alloys. Depending on the material grade, critical temperature and desired cooling ...	02/10/2004
6599371	Hydrogen peroxide pickling scheme for silicon-containing electrical steel grades The pickling process of the present invention is designed for pickling electrical steel strip in a continuous fashion and comprises at least one pickling tank equipped with at least one set of sprayers designed to spray the top and bottom surfaces of a st...	07/29/2003
6368430	Process for quenching heat treatable metal alloys The present invention is directed to a process comprised of a controllably variable liquid quenching means for metal alloys at or above the Leidenfrost temperature without metal alloy distortion....	04/09/2002
5985059	Transition metal salt compositions that eliminate hydrogen absorption and enhance hydrogen degassing of metal and metal alloys A method of controlling bulk absorption of atomic hydrogen and facilitating degassing of hydrogen from a metal or metal alloy workpiece during heat treatments in furnaces with ambient and/or moisture-laden atmospheres, the method includes exposing the sur...	11/16/1999
5868878	Heat treatment by plasma electron heating and solid/gas jet cooling A workpiece is heated by first forming an ionized gas plasma around the workpiece. A positive potential is applied to the workpiece to accelerate electrons from the plasma into the workpiece. The workpiece is uniformly surface heated by the energy directe...	02/09/1999
5820705	Spray quenching of metal with liquid coolant containing dissolved gas A method of quenching a metal object having steps of: (a) providing a liquid coolant having a temperature from about 100° F. to about 180° F. and containing about 0.01 to about 0.1 standard cubic feet of carbon dioxide gas per gallon of water dissolved ...	10/13/1998
5788784	Process for intermediately quenching light-metal castings coming from a solution heat treatment furnance This invention relates to a process for heat treating light-metal castings, particularly cylinder heads for piston engines, in which, after solidifying and removing the castings from the mold, they are solution treated with the residual casting heat at ap...	08/04/1998
5681407	Method of heat treating metal with liquid coolant containing dissolved gas A method of quenching a metal object comprising: (a) providing a reservoir of liquid coolant containing gas that has been dissolved therein; and (b) immersing the metal object in the reservoir to quench the metal. The gas is selected from the group consis...	10/28/1997
5264056	Method and apparatus for annealing nuclear reactor pressure vessels A nuclear reactor annealing apparatus and method for annealing a vessel of the reactor by utilizing a non-aqueous fluid, a means for replacing water in the vessel with the non-aqueous fluid, a means for heating the non-aqueous fluid to a predetermined tem...	11/23/1993
4738731	Method of heat treating metal using a washable synthetic quenchant A method of quenching metal components utilizing a water based quenching composition which includes a polyvinylpyrrolidone polymer of high molecular weight and in relatively high concentrations and thereafter power washing the parts to remove the polymeri...	04/19/1988
4596612	Method of quenching metals A metal quenchant fluid which is a mixture of water and a polyalkylene glycol and a inhibitor is substantially nitrite free. The inhibitor is a soluble product obtained by mixing a carboxylic acid having 4 to 12 carbon atoms in the molecule, an amine such...	06/24/1986
4584033	Method of quenching A method of quenching which comprises the steps of (a) immersing a metal heated to an elevated temperature in a quenchant composition comprising an aqueous-solution of a sufficiently hydrophilic water-soluble or water-dispersible organic polymer of the fo...	04/22/1986
4486246	Polyoxazolines in aqueous quenchants Metal, such as steel, is quenched in a quenching bath comprising an aqueous solution of a substituted oxazoline polymer, one example of which is polyethyloxazoline having a molecular weight of 50,000 to 500,000. The bath is capable of providing quenching ...	12/04/1984
4441937	Quenching bath and quenching method for metals Bath for the quenching of ferrous and nonferrous metals and their alloys, comprising a hydrogenated starch hydrolysate having, expressed with respect to the dry matter, a percentage of products of degree of polymerization 1 and 2 comprised between 1 and 9...	04/10/1984
4381205	Metal quenching process A process of quenching metal using as the quenching medium an aqueous solution containing from about 0.5% to 50% by weight of a liquid, water-soluble, capped polyether polyol obtained by reacting ethylene oxide and at least one lower alkylene oxide having...	04/26/1983
4243439	Process of quenching metal pieces and product produced The invention concerns a new process for quenching metallic pieces and intended to limit the stresses engendered by quenching without essentially affecting the characteristics. This process consists of quenching the pieces by immersion in a binder of the ...	01/06/1981
4087290	Process for the controlled cooling of ferrous metal Austenitized ferrous metal, such as carbon steel, is quenched by means of an aqueous solution of a salt of polyacrylic acid which develops an extremely stable and uniform water vapor envelope surrounding the steel. Rate of cooling is controlled by (1) the...	05/02/1978
4077814	Method for thermally treating metal components A method for thermally treating metal components. The metal components which are in a partially finished condition are annealed by being placed within a liquid bath which is at a temperature between 200° and 300° C. The liquid bath is a mineral oil and ...	03/07/1978
3977915	Method of heat treating metal parts Disclosed is a method for heat treating nonferrous metal parts. These parts are suspended in a settable ceramic slurry. The combination is formed into a solid mass by setting of a gelling binder contained therein. The set mass is then aged in an envelopin...	08/31/1976

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Class 148/713 - In liquid state