US2498711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency amplifier
Assignee: STC PLC
•
Filing: 1945-04-02
•
Granted: 1950-02-28
•
Expires: 1965-04-02
Abstract
No abstract record available.
Inventors
- 👤 Royden George Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:08
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/02; H03F1/04; H03F1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2299571A
Cited
US1501569A
Cited
US1772374A
Cited
US2149077A
Cited
US2230243A
Cited
US2255839A
Cited
US2284181A
Cited
US2340364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-27 | 1953-08-29 | 1954-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-27 | 1957-08-29 | 1958-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-27 | 1961-08-29 | 1962-02-28 | $7700.00 | Window Closed / Lapsed |