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:
Nov. 06, 2012
Filed:
Mar. 05, 2007
Garrin Samii, Laguna Hills, CA (US);
Banafsheh Behnam, Arlington, MA (US);
David Veno, Woburn, MA (US);
Abbas Samii, Belmont, MA (US);
Garrin Samii, Laguna Hills, CA (US);
Banafsheh Behnam, Arlington, MA (US);
David Veno, Woburn, MA (US);
Abbas Samii, Belmont, MA (US);
Advanced Membrane Systems, Inc., North Billerica, MA (US);
Abstract
A ceramic microporous polyolefin battery separator membrane, high in air permeability, low in shrinkage and improved temperature resistance addresses the safety requirements of lithium ion batteries. The separators made by the current invention consists of one or more polyolefin polymers and kaolin fillers comprised of aluminum oxide and silicon oxide. The membranes of current invention have a thickness of 5-200 microns, air permeability of 1-200 sec/10 cc (Gurley seconds), and average pore diameter of less than 1 micron.