US2653178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermocouple device
Assignee: SPEED DEV Co Ltd
•
Filing: 1951-10-10
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Granted: 1953-09-22
•
Expires: 1971-10-10
Abstract
No abstract record available.
Inventors
- 👤 Ruffle William Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:35
CPC Classifications
H; H10; H10N; H10N10/00; H10N10/10; H10N10/17
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) | 1956-09-21 | 1957-03-23 | 1957-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-21 | 1961-03-23 | 1961-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-21 | 1965-03-23 | 1965-09-22 | $7700.00 | Window Closed / Lapsed |