US2883647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supervisory remote control and signalling system
Assignee: SERVO ELECTRONIC SWITCH AND SIGNAL CO
•
Filing: 1952-11-15
•
Granted: 1959-04-21
•
Expires: 1972-11-15
Abstract
No abstract record available.
Inventors
- 👤 Leeds Charles Murray
- 👤 Henry B Hoff
- 👤 William M Pelino
- 👤 Johannesen John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:11
CPC Classifications
B; B61; B61L; B61L7/00; B61L7/06; B61L7/08; B61L7/088
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1888985A
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US2197130A
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US2229249A
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US1995272A
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US2141551A
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US2272613A
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US2445895A
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US2627063A
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US2584739A
Cited
US2629088A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-20 | 1962-10-20 | 1963-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-20 | 1966-10-20 | 1967-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-20 | 1970-10-20 | 1971-04-21 | $7700.00 | Window Closed / Lapsed |