Patent US2666181A successfully refreshed from Google Patents.
US2666181A
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US
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Phase modulation system
Assignee: General Electric Co
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Filing: 1949-08-31
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Granted: 1954-01-12
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Expires: 1969-08-31
Abstract
No abstract record available.
Inventors
- 👤 Emmanuel P Courtillot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:50
CPC Classifications
H; H03; H03C; H03C3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2077223A
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US2048081A
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US2262468A
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US2413440A
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US2420374A
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US2469837A
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US2483271A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-11 | 1957-07-13 | 1958-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-11 | 1961-07-13 | 1962-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-11 | 1965-07-13 | 1966-01-12 | $7700.00 | Window Closed / Lapsed |