US2912599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parametric switching circuit amplifier
Assignee: Individual
•
Filing: 1957-03-29
•
Granted: 1959-11-10
•
Expires: 1977-03-29
Abstract
No abstract record available.
Inventors
- 👤 Abraham George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:27
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03F; H03F7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2627575A
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US2627039A
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US2708720A
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US2666816A
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US2595208A
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US2594449A
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US2644892A
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US2644893A
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US2691073A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |