Patent DE141108C successfully refreshed from Google Patents.
US2999170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Receivers for use in electric signalling systems
Assignee: The General Electric Company PLC
•
Filing: 1957-05-27
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Granted: 1961-09-05
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Expires: 1977-05-27
Abstract
No abstract record available.
Inventors
- 👤 Tyler David Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:59
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/10; H04L27/14; H04L27/144; H04L27/148
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2491387A
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US2644036A
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US2903605A
Cited
US2884518A
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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) | 1964-09-04 | 1965-03-06 | 1965-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-04 | 1969-03-06 | 1969-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-04 | 1973-03-06 | 1973-09-05 | $7700.00 | Window Closed / Lapsed |