Patent US2744159A successfully refreshed from Google Patents.
US2744159A
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Multiplex electric signalling system
Assignee: International Standard Electric Corp
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Filing: 1951-02-26
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Granted: 1956-05-01
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Expires: 1971-02-26
Abstract
No abstract record available.
Inventors
- 👤 Wright Esmond Philip Goodwin
- 👤 Hartley George Clifford
- 👤 Weir Donald Adams
- 👤 Rice Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:38
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/13; H01J1/14; H04; H04J; H04J1/00; H04J1/02; H04J1/10; H04J1/14; H04J3/00; H04J3/02; H04J3/04; H04J3/042; H04J3/12
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) | 1959-05-01 | 1959-10-31 | 1960-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-01 | 1963-10-31 | 1964-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-01 | 1967-10-31 | 1968-05-01 | $7700.00 | Window Closed / Lapsed |