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:
Sep. 01, 2026
Filed:
Jan. 20, 2022
Metal One Corporation, Tokyo, JP;
Teruaki Suzuki, Tokyo, JP;
Masatsugu Nishi, Tokyo, JP;
Nobuhide Sato, Tokyo, JP;
Kenzo Urabe, Tokyo, JP;
Tomonori Inoue, Tokyo, JP;
METAL ONE CORPORATION, Tokyo, JP;
Abstract
A steel pipe joint structure connects a first steel pipe and a second steel pipe with each other, the first steel pipe having an external thread, the second steel pipe having an internal thread, wherein the first steel pipe has the external thread, and the second steel pipe has the internal thread. The external thread part includes a pin front parallel thread part, and a pin complete thread part, and the internal thread part includes a box rear incomplete thread part, and a box complete thread part. The box rear incomplete thread part and the pin front parallel thread part are threadedly engaged with each other and, in cross section including a pipe axis, a root of the pin front parallel thread part has a larger width than a root of the pin complete thread part.