Liquid crystal clinical thermometer
US5676465A · kind A · utility
3Cited by
9References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 22, 1994 |
| Grant date | Oct 14, 1997 |
| Priority date | — |
| Expiry date | Nov 22, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K11/165
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method is disclosed for improving the signal retention of a liquid crystal sensing element comprising an embossed cavity containing the liquid crystal and a cover layer sealing the liquid crystal in the cavity by heat treating at about 95.degree. to about 120.degree. C. for a time sufficient to cause the embossed cavity to shrink to substantially its original form thereby forcing the liquid crystal to be forced up against the cover layer to form a domed structure. Essential to the success of the process is incorporation in the cavity of about 10 to about 50% by volume of air based on the volume of the cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.