	US 11,925,763 B2
	Adsorbent cartridge with accurate visual indicator
Douglas B. McKenna, Avondale, PA (US); Vince Suddard, Hockessin, DE (US); and Glenn Shealy, Hockessin, DE (US)
Assigned to Micropore, Inc., Elkton, MD (US)
Filed by Micropore, Inc., Elkton, MD (US)
Filed on Nov. 29, 2022, as Appl. No. 18/071,326.
Application 18/071,326 is a continuation of application No. 17/245,490, filed on Apr. 30, 2021, abandoned.
Application 17/245,490 is a continuation of application No. 16/343,705, granted, now 10,994,091, issued on May 4, 2021, previously published as PCT/US2017/057592, filed on Oct. 20, 2017.
Claims priority of provisional application 62/411,409, filed on Oct. 21, 2016.
Prior Publication US 2023/0118894 A1, Apr. 20, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 16/10 (2006.01); A61M 16/22 (2006.01); A62B 19/00 (2006.01); B01D 53/04 (2006.01); B01J 20/04 (2006.01); B01J 20/08 (2006.01); B01J 20/22 (2006.01); B01J 20/26 (2006.01); B01J 20/28 (2006.01); A62B 18/08 (2006.01); B01D 35/143 (2006.01)

CPC A61M 16/105 (2013.01) [A61M 16/104 (2013.01); A61M 16/22 (2013.01); A62B 19/00 (2013.01); B01D 53/0415 (2013.01); B01J 20/041 (2013.01); B01J 20/08 (2013.01); B01J 20/22 (2013.01); B01J 20/26 (2013.01); B01J 20/28033 (2013.01); B01J 20/28052 (2013.01); A61M 2016/103 (2013.01); A61M 2205/584 (2013.01); A62B 18/088 (2013.01); B01D 35/143 (2013.01); B01D 2253/112 (2013.01); B01D 2257/504 (2013.01); B01D 2259/4533 (2013.01)]

16 Claims

1. An adsorbent cartridge for removing gaseous contaminants, comprising layers of one or more self-supporting adsorbent sheets mechanically spaced to provide gas flow channels between the layers from one end of the cartridge to the other, wherein the cartridge further comprises a color indicator for visually indicating consumption of the adsorbent to an external observer, wherein the color indicator is applied solely to an outermost layer of the cartridge such that the color indicator is visible to the external observer.