Patent US2758158A successfully refreshed from Google Patents.
US2758158A
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US
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Automatic telecommunication system with absent subscriber service
Assignee: International Standard Electric Corp
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Filing: 1952-11-18
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Granted: 1956-08-07
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Expires: 1972-11-18
Abstract
No abstract record available.
Inventors
- 👤 Kruithof Jakob
- 👤 Nys Louis Jacques Ghislain
- 👤 Donceel Jules Louis Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:33
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/42; H04M3/50; H04M3/51; H04M3/54
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) | 1959-08-07 | 1960-02-06 | 1960-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-07 | 1964-02-06 | 1964-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-07 | 1968-02-06 | 1968-08-07 | $7700.00 | Window Closed / Lapsed |