US2509705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expander-contractor amplifier system
Assignee: RCA Corp
•
Filing: 1946-04-23
•
Granted: 1950-05-30
•
Expires: 1966-04-23
Abstract
No abstract record available.
Inventors
- 👤 William J Stolze
- 👤 Francis C Gow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:28
CPC Classifications
H; H03; H03G; H03G7/00; H03G7/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USRE21293E
Cited
US1691147A
Cited
US1690224A
Cited
US1937754A
Cited
US2082627A
Cited
US2084119A
Cited
US2136873A
Cited
US2171531A
Cited
US2257795A
Cited
US2316113A
Cited
US2473893A
Cited
US2410550A
Cited
US2363361A
Cited
US2444442A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-29 | 1953-11-28 | 1954-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-29 | 1957-11-28 | 1958-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-29 | 1961-11-28 | 1962-05-30 | $7700.00 | Window Closed / Lapsed |