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. 17, 1990
Filed:
Dec. 06, 1984
Applicant:
Inventors:
Jee I Kau, Concord, CA (US);
Dale M Pickelman, Auburn, MI (US);
Donald L Schmidt, Midland, MI (US);
Ritchie A Wessling, Midland, MI (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; B01D / ;
U.S. Cl.
CPC ...
210490 ; 21050023 ; 21050027 ; 21050036 ; 21050042 ; 210506 ;
Abstract
A novel reverse osmosis membrane comprising a hydroxyalkyl methacrylate film cross-linked with a vinylaralkyl dialkylsulfonium salt is described. This film, when cast on a compatible substrate, results in a membrane of exceptional chlorine resistance.