US2618703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Keyed direct current reinsertion circuit
Assignee: Hazeltine Research Inc
•
Filing: 1947-12-13
•
Granted: 1952-11-18
•
Expires: 1967-12-13
Abstract
No abstract record available.
Inventors
- 👤 Roderic V Lowman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:46
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/44; H04N5/52; H04N5/53; H04N5/14; H04N5/16; H04N5/18; H04N5/185
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-18 | 1956-05-19 | 1956-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-18 | 1960-05-19 | 1960-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-18 | 1964-05-19 | 1964-11-18 | $7700.00 | Window Closed / Lapsed |