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:
Jun. 17, 2025
Filed:
May. 14, 2020
Applicant:
Dupont Safety & Construction, Inc., Wilmington, DE (US);
Inventors:
Hyun Sung Lim, Midlothian, VA (US);
Pankaj Arora, Chesterfield, VA (US);
Assignee:
DUPONT SAFETY & CONSTRUCTION, INC., Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 50/44 (2021.01); D01D 5/11 (2006.01); D01D 10/02 (2006.01); D01F 6/04 (2006.01); D01F 6/06 (2006.01); D04H 1/724 (2012.01); D04H 3/007 (2012.01); D04H 3/009 (2012.01); D04H 3/011 (2012.01); D04H 3/16 (2006.01); D06M 11/54 (2006.01); H01G 9/02 (2006.01); H01G 11/52 (2013.01); H01M 6/04 (2006.01); H01M 10/24 (2006.01); H01M 10/26 (2006.01); H01M 10/34 (2006.01); H01M 50/403 (2021.01); H01M 50/417 (2021.01); H01M 50/489 (2021.01); H01M 50/491 (2021.01); H01M 50/494 (2021.01);
U.S. Cl.
CPC ...
H01M 50/44 (2021.01); D01D 5/11 (2013.01); D01D 10/02 (2013.01); D01F 6/04 (2013.01); D04H 1/724 (2013.01); D04H 3/011 (2013.01); D04H 3/16 (2013.01); D04H 3/166 (2013.01); D06M 11/54 (2013.01); H01G 9/02 (2013.01); H01G 11/52 (2013.01); H01M 6/045 (2013.01); H01M 10/26 (2013.01); H01M 50/403 (2021.01); H01M 50/417 (2021.01); H01M 50/489 (2021.01); D01F 6/06 (2013.01); D04H 3/007 (2013.01); D04H 3/009 (2013.01); H01M 10/24 (2013.01); H01M 10/345 (2013.01); H01M 50/491 (2021.01); H01M 50/494 (2021.01); H01M 2220/10 (2013.01); H01M 2220/20 (2013.01); Y02E 60/13 (2013.01);
Abstract
A separator medium for electrochemical cells that contains at least one nonwoven sheet of polymeric fibers. The nonwoven sheet has a surface area of about 0.5 to about 1.5 m/g and has a maximum pore size that is equal to or more than 2.5 times the mean flow pore size and more than 11 times the minimum pore size. The sheet may be sulfonated to a level of 0.67% and demonstrates superior tensile properties after sulfonation and relative to previously known separators.