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Patent US2744965A successfully refreshed from Google Patents.
US2744965A
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Carrier type intertoll dialing telephone system
Assignee: Automatic Electric Laboratories Inc
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Filing: 1951-08-13
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Granted: 1956-05-08
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Expires: 1971-08-13
Abstract
No abstract record available.
Inventors
- 👤 Molnar Imre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:43
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/0016; H04M; H04M3/00; H04M3/08; H04M3/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2564048A
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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) | 1959-05-08 | 1959-11-07 | 1960-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-08 | 1963-11-07 | 1964-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-08 | 1967-11-07 | 1968-05-08 | $7700.00 | Window Closed / Lapsed |