US2786903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tuned thermionic valve amplifiers
Assignee: Marconis Wireless Telegraph Co Ltd
•
Filing: 1951-11-02
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Granted: 1957-03-26
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Expires: 1971-11-02
Abstract
No abstract record available.
Inventors
- 👤 Price Thomas Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:06
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/26; H03F3/28; H03C; H03C1/00; H03C1/50; H04; H04Q; H04Q3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR852645A
Cited
US2284181A
Cited
US2253942A
Cited
US2393709A
Cited
US2543973A
Cited
US2540817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-25 | 1960-09-24 | 1961-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-25 | 1964-09-24 | 1965-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-25 | 1968-09-24 | 1969-03-26 | $7700.00 | Window Closed / Lapsed |