Patent US3017464A successfully refreshed from Google Patents.
US3017464A
Expired / Lapsed
US
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Frequency shift modulation receiver
Assignee: Western Union Telegraph Co
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Filing: 1958-12-03
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Granted: 1962-01-16
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Expires: 1978-12-03
Abstract
No abstract record available.
Inventors
- 👤 John E Boughtwood
- 👤 Thaddeus M Grybowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:22
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/10; H04L27/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1795393A
Cited
US2142218A
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US2243417A
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US2291369A
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US2376126A
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US2424961A
Cited
US2463402A
Cited
US2654801A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-15 | 1965-07-17 | 1966-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-15 | 1969-07-17 | 1970-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-15 | 1973-07-17 | 1974-01-16 | $7700.00 | Window Closed / Lapsed |