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. 04, 1991
Filed:
Jan. 09, 1990
Applicant:
Inventor:
Stephen M Wolpert, Detroit, MI (US);
Assignee:
Gelman Sciences, Inc., Ann Arbor, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; B01D / ;
U.S. Cl.
CPC ...
21050035 ; 55158 ; 21050038 ; 21050041 ; 264 41 ;
Abstract
Microporous filtration membranes are provided which are useful for absorbing or adsorbing cationic atoms, molecules or particles from liquids or gases. The invention also concerns novel strongly acidic copolymer solutions capable of crosslinking, and a process for preparing such solutions and making strongly acidic or anionic charge modified microporous filtration membranes therefrom. The copolymer of the solutions is synthesized from 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) and either N-(isobutoxymethyl)acrylamide (IBMA) or 2-hydroxyethyl methacrylate (HEMA).