Patent US3409877A successfully refreshed from Google Patents.
US3409877A
Expired / Lapsed
US
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Automatic maintenance arrangement for data processing systems
Assignee: AT&T Inc
•
Filing: 1964-11-27
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Granted: 1968-11-05
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Expires: 1984-11-27
Abstract
No abstract record available.
Inventors
- 👤 Michael E Alterman
- 👤 Donald W Huffman
- 👤 S Vigliante Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:12
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04; H04Q11/0407
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE1118274B
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DE1118273B
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US3060273A
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GB954226A
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GB954225A
Cited
US3238311A
Cited
US3303474A
Cited
US3268669A
Cited
US3299220A
Cited
US3302182A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |