US 12,436,503 B2
Single use disposable elapsed time indicator with absorbable material
Shwetha Mahadev, Bangalore (IN); Shraya Sajjanar, Dharwad (IN); and Abin Austin, Thrissur (IN)
Assigned to CAREFUSION 303, INC., San Diego, CA (US)
Filed by CAREFUSION 303, INC., San Diego, CA (US)
Filed on Sep. 15, 2022, as Appl. No. 17/945,757.
Prior Publication US 2024/0094679 A1, Mar. 21, 2024
Int. Cl. G04F 1/02 (2006.01); G04F 1/00 (2006.01)
CPC G04F 1/02 (2013.01) [G04F 1/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A single use disposable elapsed time indicator comprising:
a flexible chamber for holding an aqueous medium;
a slot having a first end and second end opposing the first end and with a viewing window and a longitudinal axis, wherein the first end of the slot is connected to the chamber via a passage having a breakable seal therein;
an absorbable material located within and at confined to the first end of the slot that swells upon exposure to the aqueous medium; and
a graded scale along the longitudinal axis of the slot to indicate periods of elapsed time;
wherein the absorbable material is configured to expand from the first end of the slot toward a previously empty second end of the slot along the longitudinal axis of the slot at a predetermined rate and thereby mark elapsed time on the graded scale.