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. 05, 2004
Filed:
Feb. 18, 1999
Shoei Teshima, Handa, JP;
Yoshiharu Hasegawa, Obu, JP;
Ichiro Taninaka, Himeji, JP;
Tsutomu Usami, Nagoya, JP;
Yuji Hisatomi, Kasugai, JP;
Other;
Abstract
An aluminum extruded multi-cavity flat tube for use in an automotive heat exchanger having excellent brazing characteristics. At least one of the flat surfaces of said aluminum extruded multi-cavity flat tube is coated with a flux composition comprising a brazing flux and a synthetic resin based, as its main constituent, on a methacrylate homopolymer or a methacrylate copolymer or, alternatively, with a brazing composition comprising a brazing flux, brazing metals, and said synthetic resin. In a preferred embodiment, such a coating is provided by applying to a surface of an aluminum extruded multi-cavity flat tube, said compositions as added to an organic solvent and having a molecular structure wherein the atomic ratio of carbon to oxygen is between 2 and 3, by a roll-transfer printing technique.