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:
Dec. 16, 2025
Filed:
Feb. 15, 2022
Toyo Seikan Group Holdings, Ltd., Tokyo, JP;
Osamu Koseki, Kanagawa, JP;
Satoshi Tanaka, Kanagawa, JP;
Yosuke Matsuoka, Kanagawa, JP;
Takaharu Nishiyama, Kanagawa, JP;
TOYO SEIKAN GROUP HOLDINGS, LTD., Tokyo, JP;
Abstract
An adherent cell culture substrate, which is a sheet-shaped substrate used for producing a culture vessel for adherent cells, includes a groove including a crest-shaped portion and a valley-shaped portion on one surface side of the substrate, in which a distance from a top end portion of the crest-shaped portion to the other surface of the substrate is 1 mm or less. Further, it is preferable that a cross section of the groove perpendicular to a direction in which the groove extends is formed in a substantially V-shape and an inclination angle of a side surface of the substantially V-shape of the groove is 80 degrees or less. Further, it is preferable that a plurality of the grooves are linearly arranged in parallel and the top end portions of the crest-shaped portions are formed in a linear shape.