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. 28, 1981
Filed:
Jan. 19, 1979
Applicant:
Inventor:
Robert E Kesting, Irvine, CA (US);
Assignee:
Puropore Inc., Tustin, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; B01D / ; B29D / ; G02C / ;
U.S. Cl.
CPC ...
264-17 ; 210650 ; 210654 ; 2105001 ; 2105002 ; 260-9 ; 260 13 ; 264215 ; 264216 ; 264217 ; 264218 ; 3511 / ; 4273855 ; 428412 ; 428526 ; 428534 ; 525424 ;
Abstract
Membrane forming polymers are converted to hydrophilic polymeric membranes by (a) grafting a polyoxyethylene chain to a membrane forming polymer structure and thereafter forming a membrane; (b) coating a membrane with a polymer to which a polyoxyethylene chain has been grafted; or (c) grafting in situ a polyoxyethylene chain to a formed membrane polymer.