US2463944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant potential source of the thermocouple type
Assignee: Bristol Co
•
Filing: 1943-10-25
•
Granted: 1949-03-08
•
Expires: 1963-10-25
Abstract
No abstract record available.
Inventors
- 👤 Perry A Borden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:09
CPC Classifications
H; H10; H10N; H10N10/00; H10N10/10; H10N10/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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FR318570A
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US1344462A
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US1441207A
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US1662889A
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US1666919A
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US2312022A
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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) | 1952-03-07 | 1952-09-06 | 1953-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-07 | 1956-09-06 | 1957-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-07 | 1960-09-06 | 1961-03-08 | $7700.00 | Window Closed / Lapsed |