US 12,251,489 B2
Sterilization chemical indicator
G. Marco Bommarito, Stillwater, MN (US); Scott D. Anderson, Lakeland, MN (US); Ryan W. Clarke, Woodbury, MN (US); Paul N. Holt, St. Paul, MN (US); William E. Foltz, Cottage Grove, MN (US); Timothy J. Nies, Stillwater, MN (US); and Kevin D. Landgrebe, Woodbury, MN (US)
Assigned to Solventum Intellectual Properties Company, Maplewood, MN (US)
Appl. No. 17/309,515
Filed by Solventum Intellectual Properties Company, Maplewood, MN (US)
PCT Filed Dec. 19, 2019, PCT No. PCT/IB2019/061110
§ 371(c)(1), (2) Date Jun. 3, 2021,
PCT Pub. No. WO2020/128956, PCT Pub. Date Jun. 25, 2020.
Claims priority of provisional application 62/783,764, filed on Dec. 21, 2018.
Prior Publication US 2022/0054692 A1, Feb. 24, 2022
Int. Cl. A61L 2/28 (2006.01); A61L 2/07 (2006.01); G01N 33/52 (2006.01)
CPC A61L 2/28 (2013.01) [A61L 2/07 (2013.01); G01N 33/525 (2013.01); A61L 2202/14 (2013.01); A61L 2202/24 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A chemical indicator comprising:
a first sheet substantially impermeable to a sterilant;
a second sheet substantially impermeable to the sterilant positioned in an overlapping relationship with respect to the first sheet;
a third sheet disposed in between the first sheet and the second sheet;
a fluid pathway forming an open channel, the open channel defined by the first sheet forming a bottom portion of the fluid pathway, the second sheet forming a top portion of the fluid pathway, and the third sheet forming two side portions of the fluid pathway; a first end having a first opening facing out of the chemical indicator; and a second end having a second opening in fluid communication with a chamber;
and the chamber comprising a chemical composition, wherein the chamber is defined by a cutaway region of the third sheet.