US2908813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase and frequency modifying apparatus for electrical waves
Assignee: Emerson Radio Corp
•
Filing: 1956-11-28
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Granted: 1959-10-13
•
Expires: 1976-11-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert F Morrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:16
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/18; H01P1/185
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2380366A
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US2479650A
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US2602859A
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US2666181A
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US2683855A
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US2728050A
Cited
US2768356A
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US2679631A
Cited
US2834876A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-12 | 1963-04-13 | 1963-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-12 | 1967-04-13 | 1967-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-12 | 1971-04-13 | 1971-10-13 | $7700.00 | Window Closed / Lapsed |