US 11,840,632 B2
Batteries, separators, components, and compositions with heavy metal removal capability and related methods
Jeffrey K. Chambers, Philpot, KY (US); and Tejas R. Shah, Burlington, MA (US)
Assigned to Daramic, LLC, Charlotte, NC (US)
Filed by Daramic, LLC, Charlotte, NC (US)
Filed on Nov. 22, 2021, as Appl. No. 17/531,833.
Application 17/531,833 is a division of application No. 16/449,686, filed on Jun. 24, 2019, granted, now 11,208,558.
Application 16/449,686 is a division of application No. 15/614,740, filed on Jun. 6, 2017, granted, now 10,329,425, issued on Jun. 26, 2019.
Application 15/614,740 is a division of application No. 13/239,440, filed on Sep. 22, 2011, granted, now 9,683,101, issued on Jun. 20, 2017.
Claims priority of provisional application 61/385,259, filed on Sep. 22, 2010.
Prior Publication US 2022/0119640 A1, Apr. 21, 2022
Int. Cl. C08L 89/00 (2006.01); H01M 10/10 (2006.01); H01M 50/446 (2021.01)
CPC C08L 89/00 (2013.01) [H01M 10/10 (2013.01); H01M 50/446 (2021.01)] 7 Claims
OG exemplary drawing
 
1. A lead acid battery separator having a front face and a reverse face, the separator comprising:
a porous silica-filled membrane having a backweb with integral ribs, wherein the ribs comprise of positive ribs on the front face, and a plurality of negative cross ribs on the reverse face, and
wherein the negative cross ribs rib patterns include: continuous linear ribs, cross-hatched, sinusoidal or wavy continuous, sinusoidal or wavy discontinuous, intermittent and registered linear, or other rib patterns which include combinations or variations of the foregoing,
wherein the negative cross ribs have a radius of from 0.0508 mm to 0.152 mm.