US3576604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of heat detection
Assignee: United States Department of the Navy
•
Filing: 1969-03-06
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Granted: 1971-04-27
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Expires: 1989-03-06
Abstract
Abstract A METHOD FOR DETECHING HEAT EFFECTS WHICH COMPRISES APPLYING TO A UNIT AFFECTED BY HEAT A MIXTURE OF WEAKLY INTERACTING ACCEPTOR-DONOR CHEMICALS WHICH SHOW SHARP COLOR CHANGES AT SPECIFIC TEMPERATURES.
Inventors
- 👤 Peter R Hammond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:01
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; G01N25/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |