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US3704625A
Expired / Lapsed
US
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Thermometer using liquid crystal compositions
Assignee: Sankyo Keiryoki KK
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Filing: 1970-12-28
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Granted: 1972-12-05
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Expires: 1990-12-28
Abstract
Abstract A thermometer comprising a plurality of temperature responsive sections formed of liquid crystal compositions and which change their color in response to a specific range of prime temperature. Each temperature responsive section in its responsive state produces a different color depending upon temperature within the specific range. The color thus produced can be numerically identified by reading a comparable chromatic pattern.
Inventors
- 👤 Hiroshi Seto
- 👤 Mituko Ueda
- 👤 Humio Segawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:10
CPC Classifications
G; G01; G01K; G01K11/00; G01K11/12; G01K11/16; G01K11/165
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |