US2988651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regenerative pulse amplifier
Assignee: Individual
•
Filing: 1957-08-30
•
Granted: 1961-06-13
•
Expires: 1977-08-30
Abstract
No abstract record available.
Inventors
- 👤 Richard K Richards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:27
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2899553A
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US2144995A
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US2554905A
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US2764688A
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US2835828A
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US2782311A
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US2802118A
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US2889510A
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US2888560A
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US2840727A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |