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:
Oct. 08, 1985
Filed:
May. 07, 1984
Applicant:
Inventors:
Sidney F Bosen, Joliet, IL (US);
Bruce D Perlson, Morris, IL (US);
Assignee:
Norchem, Inc., Omaha, NE (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C23F / ;
U.S. Cl.
CPC ...
2523 / ; 252392 ; 252396 ; 422 16 ;
Abstract
An improved corrosion inhibited, freeze protected, heat transfer fluid or antifreeze composition which is comprised of at least about 0.25 weight percent phosphate as PO.sub.4, greater than 0.025 weight percent nitrite as NO.sub.2, and the balance a polyhydroxy alcohol; with the proviso that nitrate not be present in the heat transfer fluid. When the heat transfer fluid is to be used as an antifreeze composition for internal combustion engines, it can also contain a corrosion inhibitor selected from the group consisting of 2-mercaptobenzotriazole, tolyltriazole, benzotriazole, and alkali metal salts thereof and a buffering agent.