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Patent US2925776A successfully refreshed from Google Patents.
US2925776A
Expired / Lapsed
US
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Combination amplifier and oscillator unit
Assignee: Individual
•
Filing: 1944-05-15
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Granted: 1960-02-23
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Expires: 1964-05-15
Abstract
No abstract record available.
Inventors
- 👤 Robert G Ferris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:33
CPC Classifications
F; F42; F42C; F42C13/00; F42C13/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1752196A
Cited
US1755023A
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US1757288A
Cited
FR773866A
Cited
US2255245A
Cited
GB546488A
Cited
US2341351A
Cited
US2404553A
Cited
US2403567A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-22 | 1963-08-24 | 1964-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-22 | 1967-08-24 | 1968-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-22 | 1971-08-24 | 1972-02-23 | $7700.00 | Window Closed / Lapsed |