Patent US5485928A successfully refreshed from Google Patents.
US3577352A
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Temperature indicating device of dispersion filter adjusted to produce color changes near 0 degree centigrade
Assignee: Battelle-Institut
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Filing: 1968-05-17
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Granted: 1971-05-04
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Expires: 1988-05-17
Abstract
Abstract A TEMPERATURE INDICATING DEVICE USING A CHRISTIANSEN FILTER WHEREIN THE REFRACTIVE INDICES AND DISPERSION VALUES OF THE SOLID AND THE FLUID PHASE ARE SO ADJUSTED AS TO PRODUCE COLOR CHAGNES NEAR THE FREEZING POINT.
Inventors
- 👤 Jan Bol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:03
CPC Classifications
G; G01; G01K; G01K11/00; G01K11/12; Y; Y10; Y10S; Y10S252/00; Y10S252/962
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |