The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 02, 1989
Filed:
Jun. 02, 1987
Applicant:
Inventors:
Robert W Foreman, Bloomfield Hills, MI (US);
Anthony G Meszaros, Windsor, Ontario, CA;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D / ;
U.S. Cl.
CPC ...
148 18 ; 148 206 ; 148 28 ; 148 29 ;
Abstract
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 polymeric film. Another preferred embodiment uses the same high molecular weight polyvinylpyrrolidone in combination with two rust inhibiting agents which greatly extend the time during which the quenchant film left on the quenched parts remains water soluble, while still providing an excellent approximation of the cooling curve characteristic of an oil quenchant.