US2990516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse-width modulated amplifier and method
Assignee: JOHN C SIMONS JR
•
Filing: 1956-05-29
•
Granted: 1961-06-27
•
Expires: 1976-05-29
Abstract
No abstract record available.
Inventors
- 👤 Paul R Johannessen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:55
CPC Classifications
H; H03; H03K; H03K7/00; H03K7/08; H03F; H03F3/00; H03F3/20; H03F3/21; H03F3/217
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2266401A
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US2455332A
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FR970193A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |