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. 17, 1991
Filed:
Oct. 11, 1989
Applicant:
Inventor:
Jun Sasaki, Kanagawa, JP;
Assignee:
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D01D / ; D01F / ;
U.S. Cl.
CPC ...
21050023 ; 21050027 ; 21050041 ; 26417714 ; 428376 ;
Abstract
A hollow fiber membrane in which the pore size changes in such manner that it gradually decreases in the direction from the outside surface of the hollow fiber to the inside and the minimum pore size gradually increases toward the opening of the inside surface. The change in the pore size is also continuous.
Sasaki, Jun. (1991). Hollow fiber membrane (U.S. Patent No. 5049276). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5049276
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile