Patent US3160280A successfully refreshed from Google Patents.
US3365548A
Expired / Lapsed
US
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Selective access device for centralized telephone switching systems
Assignee: GASTON P LAGREZE
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Filing: 1964-10-02
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Granted: 1968-01-23
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Expires: 1984-10-02
Abstract
No abstract record available.
Inventors
- 👤 Pierre M Lucas
- 👤 Jean F Duquesne
- 👤 Gaston P Lagreze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:33
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/42; H04Q3/54; H04Q3/545; G; G06; G06F; G06F13/00; G06F13/14; G06F13/20; G06F13/22; G06F15/00; G06F15/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-22 | 1971-07-24 | 1972-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-22 | 1975-07-24 | 1976-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-22 | 1979-07-24 | 1980-01-23 | $7700.00 | Window Closed / Lapsed |