US2888918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for temperature difference detection
Assignee: BLACKHAWK INSTR Co
•
Filing: 1953-09-02
•
Granted: 1959-06-02
•
Expires: 1973-09-02
Abstract
No abstract record available.
Inventors
- 👤 Franklin W Pierce
- 👤 William A Woehr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:41
CPC Classifications
G; G01; G01K; G01K7/00; G01K7/02; G01K7/021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2425080A
Cited
US1494586A
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US1982053A
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US2392916A
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US2525094A
Cited
US2661733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |