US3495220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process control system including hardware element status map in memory
Assignee: AT&T Inc
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Filing: 1967-05-15
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Granted: 1970-02-10
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Expires: 1987-05-15
Abstract
No abstract record available.
Inventors
- 👤 David A Lawson
- 👤 Ralph W Peterson
- 👤 Alfred A Stockert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:25
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/42; H04Q3/54; H04Q3/545; H04Q3/54575; H04Q3/54591
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3060273A
Cited
US3299220A
Cited
US3375499A
Cited
US3409877A
Cited
US3411140A
Cited
US3409879A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |