Patent US2588609A successfully refreshed from Google Patents.
US2604533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amplitude modulation
Assignee: RCA Corp
•
Filing: 1949-03-08
•
Granted: 1952-07-22
•
Expires: 1969-03-08
Abstract
No abstract record available.
Inventors
- 👤 Leslie L Koros
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:00
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1744044A
Cited
US2161320A
Cited
US2247511A
Cited
US2342943A
Cited
US2305864A
Cited
US2301395A
Cited
US2500945A
Cited
US2476162A
Cited
US2421727A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-22 | 1956-01-21 | 1956-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-22 | 1960-01-21 | 1960-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-22 | 1964-01-21 | 1964-07-22 | $7700.00 | Window Closed / Lapsed |