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:
Apr. 13, 1976
Filed:
Mar. 22, 1974
Applicant:
Inventors:
Kiyoshi Ishii, Saitama, JA;
Zenjiro Honda, Saitama, JA;
Assignee:
Daicel Ltd., Osaka, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; B01D / ; B29D / ;
U.S. Cl.
CPC ...
2105 / ; 210 23 ; 260 302 ; 260 / ; 260 / ; 260 / ; 260 / ; 260 / ; 260 / ; 260 / ; 260 / ; 264 41 ; 264331 ;
Abstract
A semipermeable membrane for ultrafiltration is prepared by Dissolving a copolymer of acrylonitrile (90 to 60 molar percent based on total monomers) and a non-electrolytic water-soluble vinyl monomer (40 to 10 molar percent based on total monomers) in a solvent selected from