US 12,237,534 B2
Battery separators with cross ribs and related methods
Eric H. Miller, Philpot, KY (US); and J. Kevin Whear, Utica, KY (US)
Assigned to Daramic, LLC, Charlotte, NC (US)
Filed by Daramic, LLC, Charlotte, NC (US)
Filed on Mar. 11, 2024, as Appl. No. 18/601,049.
Application 18/601,049 is a division of application No. 17/089,428, filed on Nov. 4, 2020, granted, now 11,942,655.
Application 17/089,428 is a division of application No. 15/898,705, filed on Feb. 19, 2018, granted, now 10,833,306, issued on Nov. 10, 2020.
Application 15/898,705 is a continuation of application No. 12/904,371, filed on Oct. 14, 2010, granted, now 9,935,302, issued on Apr. 3, 2018.
Claims priority of provisional application 61/253,096, filed on Oct. 20, 2009.
Prior Publication US 2024/0234948 A1, Jul. 11, 2024
Int. Cl. H01M 50/44 (2021.01); H01M 50/417 (2021.01); H01M 50/449 (2021.01); H01M 50/463 (2021.01); H01M 10/06 (2006.01); H01M 50/466 (2021.01); H01M 50/489 (2021.01); H01M 50/491 (2021.01)
CPC H01M 50/44 (2021.01) [H01M 50/417 (2021.01); H01M 50/449 (2021.01); H01M 50/463 (2021.01); H01M 10/06 (2013.01); H01M 50/466 (2021.01); H01M 50/489 (2021.01); H01M 50/491 (2021.01); Y10T 29/49108 (2015.01)] 15 Claims
OG exemplary drawing
 
1. A separator for a lead acid battery comprising:
a porous membrane having a positive electrode face and a negative electrode face that are opposite faces of the porous membrane;
a plurality of longitudinally extending ribs being disposed upon said positive electrode face; and
a plurality of substantially transversely extending ribs being disposed upon said negative electrode face.