Selected time interval indicating device
US3954011A · kind A · utility
73Cited by
8References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 10, 1973 |
| Grant date | May 4, 1976 |
| Priority date | — |
| Expiry date | Oct 10, 1993 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/913
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Indicating device suitable for visibly measuring parameters such as time, temperature, and time-temperature relationships. The device includes a porous fluid carrying pad, a wick material for said fluid, and an indicator means whereby the progress of fluid along the wick material can be visibly indicated and used to measure the passage of time, the exposure to a given minimum temperature, or a time-temperature relationship. The combination is adapted to regulate migration of fluid from the fluid source to the wick material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.