Patent US3058049A successfully refreshed from Google Patents.
US3058049A
Expired / Lapsed
US
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Serrodyne frequency shifters
Assignee: Raytheon Co
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Filing: 1959-03-30
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Granted: 1962-10-09
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Expires: 1979-03-30
Abstract
No abstract record available.
Inventors
- 👤 Francis J O'hara
- 👤 Scharfman Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:16
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/165; H01P1/175
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-08 | 1966-04-09 | 1966-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-08 | 1970-04-09 | 1970-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-08 | 1974-04-09 | 1974-10-09 | $7700.00 | Window Closed / Lapsed |