Patent US2939968A successfully refreshed from Google Patents.
US2939968A
Expired / Lapsed
US
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Transistor emitter follower circuit
Assignee: General Precision Inc
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Filing: 1957-08-13
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Granted: 1960-06-07
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Expires: 1977-08-13
Abstract
No abstract record available.
Inventors
- 👤 Drubin Meir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:39
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/50; H03F1/00; H03F1/34; H03F1/347; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2810080A
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US2774888A
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US2837651A
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US2887590A
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US2873388A
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US2849615A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |