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:
Feb. 14, 1995
Filed:
Apr. 01, 1993
Victor S Chang, Ellicott City, MD (US);
Richard C Hartwig, Laurel, MD (US);
James K Kung, Lexington, MA (US);
Joseph T Lundquist, Gilroy, CA (US);
Marc E Parham, Bedford, MA (US);
James A Avtges, Belmont, MA (US);
Anthony J Laccetti, North Andover, MA (US);
W. R. Grace & Co.-Conn., New York, NY (US);
Abstract
A battery separator composed of a microporous sheet product having first and second major surfaces and a thickness of less than about 50 mils, formed from a uniform mixture of a polysulfone polymer and a filler or polysulfone polymer and structure enhancing agent, said sheet product having a fibrous sheet embedded within said mixture and between the first and second major surfaces. The porosity of the sheet product is at least about 60 volume percent composed of pores such that the average pore diameter increases from each major surface toward the interior of the sheet product's thickness.