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:
Aug. 09, 1994
Filed:
Jan. 22, 1993
Hisao Hachisuka, Osaka, JP;
Katsuhide Kojima, Osaka, JP;
Yutaka Nakazono, Osaka, JP;
Mitsuru Shimizu, Osaka, JP;
Masahiko Hirose, Osaka, JP;
Yasuo Kihara, Osaka, JP;
Masatoshi Maeda, Osaka, JP;
Hisashi Ikebata, Osaka, JP;
Kenji Matsumoto, Osaka, JP;
Nitto Denko Corporation, Osaka, JP;
Abstract
A composite reverse osmosis membrane comprising a thin membrane and a microporous supporting membrane supporting it, wherein said thin membrane mainly comprises a crosslinked polyamide comprising; (a) an amine component containing at least one member selected from the group consisting of substantially monomeric amine compounds each having at least two primary and/or secondary amino groups, and (b) an acid halide component containing at least one member selected from the group consisting of substantially monomeric cyclic acid halide compounds each having at least two acid halide groups and comprising at least two rings.