US 12,233,001 B2
Enclosure ventilation filter
Lloyd G. Keleny, Champlin, MN (US); Veli E. Kalayci, Farmington, MN (US); Michael J. Hebert, St. Paul, MN (US); Yehya A Elsayed, St. Paul, MN (US); David W. Mulder, Bloomington, MN (US); and Andrew J. Dallas, Lakeville, MN (US)
Assigned to Donaldson Company, Inc., Bloomington, MN (US)
Filed by Donaldson Company, Inc., Bloomington, MN (US)
Filed on Mar. 8, 2024, as Appl. No. 18/599,903.
Application 16/870,578 is a division of application No. 14/624,202, filed on Feb. 17, 2015, granted, now 10,646,370, issued on May 12, 2020.
Application 18/599,903 is a continuation of application No. 18/087,394, filed on Dec. 22, 2022, granted, now 11,925,573.
Application 18/087,394 is a continuation of application No. 16/870,578, filed on May 8, 2020, granted, now 11,534,324, issued on Dec. 27, 2022.
Application 14/624,202 is a continuation of application No. 12/414,951, filed on Mar. 31, 2009, granted, now 8,979,811, issued on Mar. 17, 2015.
Claims priority of provisional application 61/041,244, filed on Apr. 1, 2008.
Prior Publication US 2024/0293251 A1, Sep. 5, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. A61F 5/441 (2006.01); A61F 13/00 (2024.01); B01D 39/00 (2006.01); B01D 46/00 (2022.01); B01D 69/00 (2006.01); B01D 69/14 (2006.01)
CPC A61F 5/441 (2013.01) [A61F 13/0008 (2013.01); B01D 39/00 (2013.01); B01D 46/00 (2013.01); B01D 69/147 (2013.01); B01D 2253/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A filter assembly for an enclosure, comprising:
an enclosure side and a side opposite from the enclosure side;
a first layer which is gas permeable; and
an adsorbent layer comprising adsorbent particles, wherein the adsorbent particles comprise activated carbon and wherein the adsorbent layer contains less than 2% binder material by weight;
wherein the enclosure side of the filter assembly comprises:
an adhesive zone in which adhesive is present having an outer adhesive perimeter;
a weld area adjacent to at least a portion of the adhesive zone, where the filter
assembly is heat-sealable to the enclosure at the weld area.