Back to results
US 2012/0236901 A1Published application
Time-Temperature Indicator
AssigneeThe Johns Hopkins University
InventorsJohn A. Thomas, Jason E. Tiffany, Lawrence W. Hunter, Terry E. Phillips
Life of this patent
Estimating the term…
Abstract
A time-temperature indication device includes a first reservoir having a fluid disposed therein, and a capillary tube. The capillary tube is disposed proximate to the first reservoir to receive fluid from the first reservoir responsive to changes in viscosity of the fluid based on changes in temperature. The capillary tube restricts flow of the fluid out of the first reservoir into the capillary tube to enable fluid flow only in a single direction.
Claims20
A time-temperature indication device comprising:
- a first reservoir configured to receive a fluid therein;
- and
- at least one capillary tube disposed proximate to the first reservoir to receive the fluid from the first reservoir responsive to changes in viscosity of the fluid based on changes in temperature, the at least one capillary tube restricting flow of the fluid out of the first reservoir into the capillary tube to enable fluid flow only in a single direction.
Dependencies are inferred from the claim text.