US2429771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency responsive remotecontrol system
Assignee: RCA Corp
•
Filing: 1942-09-26
•
Granted: 1947-10-28
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Expires: 1962-09-26
Abstract
No abstract record available.
Inventors
- 👤 Walter Van B Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:13
CPC Classifications
G; G05; G05D; G05D3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR638442A
Cited
US2015967A
Cited
US2126910A
Cited
US2280019A
Cited
US2303654A
Cited
US2282910A
Cited
US2299581A
Cited
US2334704A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-27 | 1951-04-28 | 1951-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-27 | 1955-04-28 | 1955-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-27 | 1959-04-28 | 1959-10-28 | $7700.00 | Window Closed / Lapsed |