Patent US3457368A successfully refreshed from Google Patents.
US3457368A
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Assignee: AT&T Inc
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Filing: 1965-11-15
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Granted: 1969-07-22
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Expires: 1985-11-15
Abstract
No abstract record available.
Inventors
- 👤 George P Houcke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:57
CPC Classifications
H; H01; H01H; H01H36/00; H01H36/0006; H01H36/004; B; B41; B41J; B41J5/00; B41J5/08; H01H13/00; H01H13/70; H04; H04L; H04L13/00; H04L13/16
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) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |