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, 2010
Filed:
May. 15, 2006
Hiroyuki Ozaki, Kanagawa-ken, JP;
Kotaro Kimishima, Kanagawa-ken, JP;
Koichi Kono, Saitama-ken, JP;
Patrick Brant, Seabrook, TX (US);
Zerong Lin, Kingwood, TX (US);
Jeffery Lawrence Brinen, League City, TX (US);
Hiroyuki Ozaki, Kanagawa-ken, JP;
Kotaro Kimishima, Kanagawa-ken, JP;
Koichi Kono, Saitama-ken, JP;
Patrick Brant, Seabrook, TX (US);
Zerong Lin, Kingwood, TX (US);
Jeffery Lawrence Brinen, League City, TX (US);
Tonen Chemical Corporation, Minato-ku, Tokyo, JP;
Abstract
A microporous polyolefin membrane comprising a polyethylene resin, and polypropylene having a weight-average molecular weight of 6×10or more and a heat of fusion of 90 J/g or more (measured by a differential scanning calorimeter), a fraction having a molecular weight of 1.8×10or more being 10% or more by mass of the polypropylene.