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:
Sep. 07, 1999
Filed:
Oct. 02, 1997
Applicant:
Inventors:
Raymond R Ondeck, McMurray, PA (US);
Richard W Pekala, Allison Park, PA (US);
Richard A Schwarz, Akron, OH (US);
Robert C Wang, Wexford, PA (US);
Assignee:
PPG Industries, Inc., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M / ; H01G / ; C08J / ;
U.S. Cl.
CPC ...
429 33 ; 429309 ; 521 62 ; 521 64 ; 361524 ; 361502 ; 4283157 ;
Abstract
Very thin microporous material comprises a matrix of substantially linear polyolefin, finely divided substantially water-insoluble filler particles distributed throughout the matrix, and a network of interconnecting pores communicating substantially throughout said microporous material. The very thin microporous material can be produced by the blown film process. The material is used as a separator in a battery.