US2774069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmitter multiplexing system
Assignee: Individual
•
Filing: 1952-04-30
•
Granted: 1956-12-11
•
Expires: 1972-04-30
Abstract
No abstract record available.
Inventors
- 👤 Sam E Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:02
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/46; H03H7/468
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1604981A
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US1501667A
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US1721567A
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US1941305A
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US2082096A
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US2177761A
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US2249415A
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US2278620A
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US2308013A
Cited
US2373458A
Cited
US2593361A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-11 | 1960-06-11 | 1960-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-11 | 1964-06-11 | 1964-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-11 | 1968-06-11 | 1968-12-11 | $7700.00 | Window Closed / Lapsed |