US 11,951,226 B2
Ethylene oxide sterilization sensor including acid-functional sorbent and method of use
Michael W. Kobe, Lake Elmo, MN (US); Michael S. Wendland, North St. Paul, MN (US); Kelvin J. Witcher, Hudson, WI (US); and Richard C. Webb, St. Paul, MN (US)
Assigned to 3M Innovative Properties Company, St. Paul, MN (US)
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
Filed on Nov. 12, 2020, as Appl. No. 16/949,727.
Claims priority of provisional application 62/939,913, filed on Nov. 25, 2019.
Prior Publication US 2021/0154347 A1, May 27, 2021
Int. Cl. A61L 2/28 (2006.01); A61L 2/20 (2006.01); G01N 21/77 (2006.01); A61L 101/44 (2006.01)
CPC A61L 2/28 (2013.01) [A61L 2/206 (2013.01); G01N 21/77 (2013.01); A61L 2101/44 (2020.08)] 12 Claims
OG exemplary drawing
 
1. An ethylene oxide sterilization sensor comprising:
a heat-shrinkable film;
an acid-functional porous sorbent in thermal contact with the heat-shrinkable film; and
an acid having a boiling point above 120° C. and a pKa of no greater than 2.5, wherein the acid is impregnated in or covalently attached to the porous sorbent.