Patent US2822538A successfully refreshed from Google Patents.
US2822538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse power control
Assignee: Individual
•
Filing: 1945-11-05
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Granted: 1958-02-04
•
Expires: 1965-11-05
Abstract
No abstract record available.
Inventors
- 👤 Jr John B Trevor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:34
CPC Classifications
H; H03; H03K; H03K7/00; H03K7/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2265290A
Cited
GB520606A
Cited
US2329570A
Cited
US2404527A
Cited
US2307023A
Cited
US2451632A
Cited
US2462859A
Cited
US2492018A
Cited
US2419340A
Cited
US2572080A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-03 | 1961-08-05 | 1962-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-03 | 1965-08-05 | 1966-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-03 | 1969-08-05 | 1970-02-04 | $7700.00 | Window Closed / Lapsed |