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:
Dec. 07, 2021
Filed:
Aug. 04, 2020
Applicant:
Dupont Safety & Construction, Inc., Wilmington, DE (US);
Inventors:
Mehdi Afshari, Midlothian, VA (US);
Byoung Sam Kang, Midlothian, VA (US);
Brian R. France, N. Chesterfield, VA (US);
Assignee:
DUPONT SAFETY & CONSTRUCTION, INC., Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21H 13/26 (2006.01); D21H 17/34 (2006.01); D21H 23/04 (2006.01); D21H 15/10 (2006.01); D21H 21/14 (2006.01); H01M 50/449 (2021.01);
U.S. Cl.
CPC ...
D21H 13/26 (2013.01); D21H 15/10 (2013.01); D21H 17/34 (2013.01); D21H 21/14 (2013.01); D21H 23/04 (2013.01); H01M 50/449 (2021.01);
Abstract
A paper suitable for use as a separator or thermal or fire insulation for use in or with electrochemical cells, and an electrochemical cell comprising the same, the paper having 90 to 99 weight percent aramid fibrous pulp comprising aramid polymer fibrils and 1 to 10 weight percent polyvinylpyrrolidone present as a coating on the surface of the fibers, the paper having a thickness of 10 to 40 micrometers and a tensile strength of at least 15 megapascals or greater.