Patent US1983715A successfully refreshed from Google Patents.
US1983715A
Expired / Lapsed
US
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Modulation
Assignee: RCA Corp
•
Filing: 1931-10-22
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Granted: 1934-12-11
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Expires: 1951-10-22
Abstract
No abstract record available.
Inventors
- 👤 George L Usselman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:22
CPC Classifications
H; H03; H03C; H03C3/00; H03C3/02; H03C3/04
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) | 1937-12-10 | 1938-06-11 | 1938-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-12-10 | 1942-06-11 | 1942-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-12-10 | 1946-06-11 | 1946-12-11 | $7700.00 | Window Closed / Lapsed |