Patent US2879409A successfully refreshed from Google Patents.
US2879409A
Expired / Lapsed
US
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Diode amplifier
Assignee: Individual
•
Filing: 1954-09-09
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Granted: 1959-03-24
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Expires: 1974-09-09
Abstract
No abstract record available.
Inventors
- 👤 Arthur W Holt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:49
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/04; H03F3/10; H03K; H03K3/00; H03K3/02; H03K3/33
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2418516A
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US2565497A
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US2547386A
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US2627575A
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US2666816A
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US2647995A
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US2843765A
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US2691073A
Cited
US2737601A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |