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:
Jan. 11, 1983
Filed:
Mar. 04, 1981
Dennis D O'Rell, Boxborough, MA (US);
Nan J Lin, Burlington, MA (US);
W. R. Grace & Co., New York, NY (US);
Abstract
The instant invention is directed to a sheet product capable of forming an improved battery separator. The present sheet product is formed from a thin, acid-stable, porous material and has a first and a second major face with a plurality of separate, continuous, open channels on each face such that each channel on each major face defines a separation between two channels on the other major face. Further, each channel defines an imaginary medium line with at least some portions of at least some channels extending laterally with respect to the imaginary medium line, and every portion of each channel is capable of being at an acute angle of not greater than 70 degrees from an imaginary vertical line oriented from bottom to top of a battery containing the sheet product.