US2728818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal transfer networks for multirange high-frequency radio or television systems
Assignee: RCA Corp
•
Filing: 1950-06-30
•
Granted: 1955-12-27
•
Expires: 1970-06-30
Abstract
No abstract record available.
Inventors
- 👤 Mackey Donald
- 👤 Earl J Sass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:23
CPC Classifications
H; H03; H03H; H03H2/00; H03H2/005; H03H2/008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1759332A
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US2194180A
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US2310323A
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US2360475A
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US2423152A
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US2456800A
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US2533030A
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US2611030A
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US2615983A
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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) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |