US2794072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signalling systems for pulse telecommunication system
Assignee: Compagnie Industrielle des Telephones SA
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Filing: 1952-03-18
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Granted: 1957-05-28
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Expires: 1972-03-18
Abstract
No abstract record available.
Inventors
- 👤 Oswald Jacques
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:30
CPC Classifications
H; H04; H04J; H04J3/00; H04J3/02; H04J3/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2539497A
Cited
US2613279A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-27 | 1960-11-26 | 1961-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-27 | 1964-11-26 | 1965-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-27 | 1968-11-26 | 1969-05-28 | $7700.00 | Window Closed / Lapsed |