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:
May. 07, 1991
Filed:
Mar. 30, 1990
Takanori Sato, Tokyo, JP;
Yasushi Watanabe, Tokyo, JP;
Seiho Kitagawa, Tokyo, JP;
Hideyo Shiokawa, Tokyo, JP;
Tomoo Shokawa, Tokyo, JP;
Yutaka Saito, Tokyo, JP;
Osamu Hosokawa, Tokyo, JP;
Takeshi Sano, Tokyo, JP;
Kazunori Koshida, Tokyo, JP;
Yasukazu Nakamura, Tokyo, JP;
Hideo Nakashima, Tokyo, JP;
Kenichi Ikeda, Tokyo, JP;
Yoshihiro Orito, Tokyo, JP;
Shimizu Construction Co., Ltd., Tokyo, JP;
Abstract
A concrete filled steel tube column. The concrete filled steel tube column includes a steel tube having an inner face; a concrete core disposed within the steel tube; and a separating layer interposed between the inner face of the steel tube and the concrete core for separating the concrete core from the inner face of the steel tube so that the steel tube may not be bonded to the concrete core. After the separating layer is formed on the inner face of the steel tube, the concrete is charged into the steel tube to form a concrete core.