US2871376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature sensitive transistor control circuit
Assignee: AT&T Inc
•
Filing: 1953-12-31
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Granted: 1959-01-27
•
Expires: 1973-12-31
Abstract
No abstract record available.
Inventors
- 👤 Ernest R Kretzmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:31
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/2033; G05D23/2034
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2585077A
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US2579336A
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US2604496A
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US2696739A
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US2757243A
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US2693568A
Cited
US2693572A
Cited
US2802071A
Cited
US2808471A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-26 | 1962-07-28 | 1963-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-26 | 1966-07-28 | 1967-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-26 | 1970-07-28 | 1971-01-27 | $7700.00 | Window Closed / Lapsed |