US2602122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic telephone system for nonconsecutively numbered grouped lines
Assignee: Compagnie Industrielle des Telephones SA
•
Filing: 1948-07-14
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Granted: 1952-07-01
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Expires: 1968-07-14
Abstract
No abstract record available.
Inventors
- 👤 Lesigne Henri Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:05
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1597784A
Cited
US1694623A
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US1716986A
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US1799175A
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US1891423A
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US2190140A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-01 | 1955-12-31 | 1956-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-01 | 1959-12-31 | 1960-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-01 | 1963-12-31 | 1964-07-01 | $7700.00 | Window Closed / Lapsed |