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:
Jun. 09, 1981
Filed:
Jan. 03, 1979
Applicant:
Inventors:
Takezo Sano, Takatsuki, JP;
Takatoshi Shimomura, Toyonaka, JP;
Masao Sasaki, Osaka, JP;
Ichiki Murase, Ibaragi, JP;
Assignee:
Sumitomo Chemical Company, Limited, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
2105002 ; 210654 ;
Abstract
A method for the preparation of a semipermeable membrane which comprises exposing porous shaped articles of polyacrylonitrile or copolymers thereof containing acrylonitrile in an amount of more than 40% by mole to a plasma. The resulting semipermeable membrane is very useful for separating substances by reverse osmosis or ultrafiltration.