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. 28, 1996
Filed:
Jul. 27, 1993
Takero Teramoto, Kawasaki, JP;
Kazuhiro Sugiyama, Kawasaki, JP;
Masaya Furukawa, Kawasaki, JP;
Hironobu Kawasato, Kawasaki, JP;
Tutomu Kaneta, Kawasaki, JP;
Kazuhiro Watanabe, Kawasaki, JP;
Nippon Steel Corporation, Tokyo, JP;
Abstract
This invention relates to separation membranes composed of a mixture of two kinds or more of polymers containing at least one kind of polymer selected from polyesters, polyethers, polycarbonates, polyamides, and polyimides with a fluorene skeleton and possessing a spongy structure throughout and the membranes can be made by a known simple process, have not only excellent separatory ability but also good mechanical properties, and are particularly useful for ultrafiltration membranes and gas separation membranes.