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:
Feb. 12, 2019
Filed:
Jan. 28, 2013
Applicant:
Jfe Steel Corporation, Tokyo, JP;
Inventors:
Takuya Nagahama, Chita, JP;
Osamu Sonobe, Niigata, JP;
Masaki Yoshikawa, Chita, JP;
Jun Takano, Chita, JP;
Takamasa Kawai, Chita, JP;
Assignee:
JFE Steel Corporation, , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 17/042 (2006.01); F16L 15/00 (2006.01);
U.S. Cl.
CPC ...
E21B 17/042 (2013.01); F16L 15/00 (2013.01); F16L 15/004 (2013.01); F16L 2201/40 (2013.01);
Abstract
A threaded joint in which the outer peripheral face of the pin nose has a single tapered shape, the seal face of the box has an outwardly convex curved shape, and a seal point xdefined by equation (1) is greater than or equal to 0.2 inches,