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:
Jul. 24, 2012
Filed:
Feb. 18, 2010
Applicants:
Masahiko Arai, Hitachinaka, JP;
Shinichi Kobayasji, Tokai, JP;
Hiroyuki Doi, Tokai, JP;
Hiroaki Chiba, Hitachi, JP;
Takashi Haneishi, Hitachi, JP;
Inventors:
Masahiko Arai, Hitachinaka, JP;
Shinichi Kobayasji, Tokai, JP;
Hiroyuki Doi, Tokai, JP;
Hiroaki Chiba, Hitachi, JP;
Takashi Haneishi, Hitachi, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G01N 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention is intended to provide a method for assessing remaining lifespan of a bolt with higher precision than conventional methods, which can be applied to a bolt comprising a high alloy with fewer tissue changes caused by creep damage. The present invention provides a method for assessing the remaining lifespan of a bolt used at high temperatures, including: