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. 07, 2015
Filed:
Nov. 20, 2008
Applicants:
Yoshihisa Tamura, Koga, JP;
Naoki Kawai, Kuki, JP;
Inventors:
Yoshihisa Tamura, Koga, JP;
Naoki Kawai, Kuki, JP;
Assignee:
Sanoh Kogyo Kabushiki Kaisha, Tokyo-To, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B 1/08 (2006.01); B32B 15/04 (2006.01); B32B 15/088 (2006.01); B32B 15/18 (2006.01); C23C 28/00 (2006.01); F02M 37/00 (2006.01); F16L 9/147 (2006.01); F16L 58/10 (2006.01);
U.S. Cl.
CPC ...
C23C 28/00 (2013.01); B32B 1/08 (2013.01); F02M 37/0017 (2013.01); F16L 9/147 (2013.01); F16L 58/109 (2013.01);
Abstract
A steel pipe has a multi-layer coating including: a plating film formed on the surface of the steel pipe; a chemical conversion coating covering the plating film; a primer coating covering the chemical conversion coating and formed from a curable epoxy resin composition composed mainly of an epoxy compound and having an amide or imide bond introduced; and a polyamide resin coating covering the primer coating. The multi-layer coating can significantly enhance the adhesion force of the polyamide coating compared to the conventional pipe.