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:
Apr. 13, 1993
Filed:
Nov. 18, 1991
Hiroyoshi Mizuno, Anjo, JP;
Masayoshi Nishikawa, Kariya, JP;
Noriaki Kishi, Anjo, JP;
Hideaki Kaneko, Tokyo, JP;
Ryosuke Sako, Hiratsuka, JP;
Naomasa Shimotomai, Kawaguchi, JP;
Nippondenso Co., Ltd., Kariya, JP;
Nihon Parkerizing Co., Ltd., Tokyo, JP;
San-Ai Oil Co., Ltd., Tokyo, JP;
Abstract
A heat exchanger made of aluminum includes a plurality of tubes made of aluminum through which a fluid to be heat exchanged flows, the tubes having a metal surface of aluminum; fins made of aluminum arranged between the tubes for accelerating heat exchange between the fluid to be heat-exchanged and air, the fins having a metal surface of aluminum; a first protecting film of a chemical conversion coating formed on the metal surfaces of the tubes and fins and containing a metal component; and a second protecting film of an antimicrobial agent coating on the first protecting film, at least on the fins among the tubes and fins, the second protecting film having a chemical bond with the metal component of the first protecting film. An example of the antimicrobial agent is 2,2'-dithiobis(pyridine-1-oxide).