Patent US2677766A successfully refreshed from Google Patents.
US3022381A
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Credit card operated telephone
Assignee: AT&T Inc
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Filing: 1959-02-26
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Granted: 1962-02-20
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Expires: 1979-02-26
Abstract
No abstract record available.
Inventors
- 👤 Pferd William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:01
CPC Classifications
G; G07; G07F; G07F17/00; G07F17/0014; G06; G06Q; G06Q20/00; G06Q20/30; G06Q20/34; G06Q20/342; G07F7/00; G07F7/02; G07F7/025; H; H04; H04M; H04M15/00; H04M15/04; H04M17/00; H04M17/02; H04M17/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1927556A
Cited
US2244500A
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US2564410A
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US2817824A
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US2846497A
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US2892048A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |