Patent US1771700A successfully refreshed from Google Patents.
US1771700A
Expired / Lapsed
US
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Method of and apparatus for multiplex signaling
Assignee: RCA Corp
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Filing: 1925-01-08
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Granted: 1930-07-29
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Expires: 1945-01-08
Abstract
No abstract record available.
Inventors
- 👤 Ernst F W Alexanderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:40
CPC Classifications
H; H04; H04J; H04J1/00
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) | 1933-07-28 | 1934-01-27 | 1934-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-07-28 | 1938-01-27 | 1938-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-07-28 | 1942-01-27 | 1942-07-29 | $7700.00 | Window Closed / Lapsed |