US2398054A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modulating method and apparatus
Assignee: PRESS WIRELESS Inc
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Filing: 1942-03-13
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Granted: 1946-04-09
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Expires: 1962-03-13
Abstract
No abstract record available.
Inventors
- 👤 Robert M Sprague
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:11
CPC Classifications
H; H03; H03C; H03C3/00; H03C3/38; H03D; H03D3/00; H03D3/26; 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) | 1949-04-08 | 1949-10-08 | 1950-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-04-08 | 1953-10-08 | 1954-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-04-08 | 1957-10-08 | 1958-04-09 | $7700.00 | Window Closed / Lapsed |