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. 21, 1992
Filed:
Dec. 28, 1988
Applicant:
Inventors:
Yosuke Takahashi, Atsugi, JP;
Toru Seita, Atsugi, JP;
Assignee:
Tosoh Corporation, Shinnanyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
264 41 ; 21050036 ; 21050042 ; 264185 ; 2642091 ; 525 61 ;
Abstract
An ultrafiltration membrane formed of a polyvinyl formal resin having a recurring unit represented by the general formula (I), and a process for producing this ultrafiltration membrane: ##STR1## wherein n is 550 to 950.