Patent US3408628A successfully refreshed from Google Patents.
US3408628A
Expired / Lapsed
US
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Data processing system
Assignee: AT&T Inc
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Filing: 1966-01-03
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Granted: 1968-10-29
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Expires: 1986-01-03
Abstract
No abstract record available.
Inventors
- 👤 Robert L Brass
- 👤 Joseph B Connell
- 👤 John A Harr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:03
CPC Classifications
G; G06; G06F; G06F15/00; G06F15/16; H; H04; H04Q; H04Q3/00; H04Q3/42; H04Q3/54; H04Q3/545
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3242467A
Cited
US3242465A
Cited
US3286236A
Cited
US3323109A
Cited
US3350689A
Cited
US3337854A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |