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:
Jun. 04, 2002
Filed:
May. 03, 2001
Applicant:
Inventors:
Assignee:
Usui Kokusai Sangyo Kaisha Ltd., Shizuoka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16L 9/14 ;
U.S. Cl.
CPC ...
F16L 9/14 ;
Abstract
A heat and corrosion resistant steel pipe having multi-layered coating comprising a steel pipe, a Zn—Ni alloy plating layer deposited to the outer surface of the steel pipe and a polyvinyl fluoride layer formed on the Zn—Ni alloy plating layer with an epoxy resin therebetween as an intermediate layer. A metal plating layer comprising Zn—Ni plating layer and Ni-plating layer may be used instead of the Zn—Ni plating layer. A chromate layer may be formed on the metal plating layer.