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:
Jul. 19, 1988
Filed:
Sep. 11, 1986
Applicant:
Inventors:
Tatsuo Sasaki, Ohtsu, JP;
Hideo Fujimaki, Shiga, JP;
Tadahiro Uemura, Kyoto, JP;
Masaru Kurihara, Ohtsu, JP;
Assignee:
Toray Industries, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
21050028 ; 21050038 ; 4283159 ; 428420 ;
Abstract
An interfacially synthesized reverse osmosis membrane comprising a microporous substrate and an ultra-thin membrane covering the substrate, wherein the ultra-thin membrane comprises a crosslinked piperazine polyamide as a main component and contains a constituent component represented by the following general formula (1): ##STR1## wherein R stands for --H or --CH.sub.3 and n is an integer of from 0 to 3.