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. 19, 2011
Filed:
Aug. 31, 2006
Koichi Kono, Asaka, JP;
Kohtaro Kimishima, Yokohama, JP;
Hiroyuki Ozaki, Kawasaki, JP;
Patrick Brant, Seabrook, TX (US);
Jeffrey L. Brinen, League City, TX (US);
Zerong Lin, Kingwood, TX (US);
Koichi Kono, Asaka, JP;
Kohtaro Kimishima, Yokohama, JP;
Hiroyuki Ozaki, Kawasaki, JP;
Patrick Brant, Seabrook, TX (US);
Jeffrey L. Brinen, League City, TX (US);
Zerong Lin, Kingwood, TX (US);
Abstract
Disclosed herein is multi-layer, microporous polyolefin membrane comprising a first porous layer comprising primarily a polyethylene, and a second porous layer comprising a polyethylene resin and polypropylene, the polypropylene having a weight-average molecular weight of 6×10or more and a heat of fusion (measured by a differential scanning calorimeter) of 90 J/g or more, a fraction of the polypropylene having a molecular weight of 5×10or less being 5% or less by mass.