Method for preparing an improved liquid crystal clinical thermometer
US6491774B2 · kind B2 · utility
1Cited by
9References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 4, 2001 |
| Grant date | Dec 10, 2002 |
| Priority date | — |
| Expiry date | Sep 4, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2323/00
- 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 to about 120° 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.