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. 20, 1976
Filed:
Oct. 07, 1974
Walter R Wszolek, Sykesville, MD (US);
Joseph A Cogliano, Baltimore, MD (US);
W. R. Grace & Co., New York, NY (US);
Abstract
This invention relates to a process for imparting permanent wettability to a battery separator comprising a non-woven mat of polyolefin fiber by impregnating said battery separator with an .alpha.-olefin/.alpha.,.beta.-unsaturated acid or anhydride copolymer or terpolymer dissolved in water by reaction with a base and thereafter causing the copolymer or terpolymer to revert to a water-insoluble substantially free acid form by either heating the impregnated battery separator to drive off the base or exposing the impregnated separator to acid. Water-insoluble herein refers to aqueous media having a pH from acidic to essentially neutral.