Patent US4510574A successfully refreshed from Google Patents.
US2510046A
Expired / Lapsed
US
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Radio-wire signaling system
Assignee: Zenith Electronics LLC
•
Filing: 1947-04-18
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Granted: 1950-05-30
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Expires: 1967-04-18
Abstract
No abstract record available.
Inventors
- 👤 Ellett Alexander
- 👤 Gilbert E Gustafson
- 👤 Cotsworth Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:39
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/16; H04N7/167; H04N7/169; H04N7/1693
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) | 1953-05-29 | 1953-11-28 | 1954-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-29 | 1957-11-28 | 1958-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-29 | 1961-11-28 | 1962-05-30 | $7700.00 | Window Closed / Lapsed |