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. 07, 1979
Filed:
Jan. 24, 1977
Applicant:
Inventors:
Takezo Sano, Takatsuki, JP;
Takatoshi Shimomura, Toyonaka, JP;
Masao Sasaki, Osaka, JP;
Ichiki Murase, Ibaraki, JP;
Manabu Hirakawa, Toyonaka, JP;
Assignee:
Sumitomo Chemical Company, Limited, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08J / ; C08J / ; C08J / ;
U.S. Cl.
CPC ...
210490 ; 264 22 ; 427 40 ; 204165 ; 2105 / ;
Abstract
A method for the preparation of semipermeable membrane which comprises exposing porous shaped articles of polysulfone to a plasma. The resulting semipermeable membrane is very useful for separating substances by reverse osmosis or ultrafiltration.