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:
Aug. 25, 2015
Filed:
Sep. 05, 2012
Applicants:
Sandra G. Claeys, Belgium, BE;
Serge S. Lievens, Belgium, BE;
Inventors:
Sandra G. Claeys, Belgium, BE;
Serge S. Lievens, Belgium, BE;
Assignee:
Chevron U.S.A. Inc., San Ramon, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
C09K 5/00 (2006.01); C09K 5/10 (2006.01); C23F 11/18 (2006.01); C09K 5/20 (2006.01); C23C 22/60 (2006.01); C23C 22/66 (2006.01);
U.S. Cl.
CPC ...
C09K 5/10 (2013.01); C09K 5/20 (2013.01); C23C 22/60 (2013.01); C23C 22/66 (2013.01); C23F 11/181 (2013.01); C23F 11/184 (2013.01); C23F 11/188 (2013.01);
Abstract
It has been found that the chemical reactivity of the metal surface of heat exchangers with coolants in presence of nitrites can be reduced by the addition of additives such as phosphonates or phosphinates. Aluminum, other Group III metals, as well as other metals commonly used in cooling systems, such as those of automobile engines, may thus be effectively protected.