Method for preparing an improved liquid crystal clinical thermometer
US6284078A · kind A · utility
26Cited by
0References
8Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 10, 1997 |
| Grant date | Sep 4, 2001 |
| Priority date | — |
| Expiry date | Apr 10, 2017 |
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.degree. C. 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.