US2269594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modulation of wire and radio transmission by frequency variation
Assignee: RCA Corp
•
Filing: 1939-03-18
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Granted: 1942-01-13
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Expires: 1959-03-18
Abstract
No abstract record available.
Inventors
- 👤 Richard E Mathes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:36
CPC Classifications
H; H03; H03G; H03G11/00; H03G11/02; H04; H04B; H04B14/00; H04B14/002; H04B14/006; H04B14/08; H04N; H04N1/00; H04N1/00095; H04N1/00103; H04N7/00; H04N7/04; H04N7/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-01-12 | 1945-07-14 | 1946-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-01-12 | 1949-07-14 | 1950-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-01-12 | 1953-07-14 | 1954-01-13 | $7700.00 | Window Closed / Lapsed |