Patent US3512133A successfully refreshed from Google Patents.
US3512133A
Expired / Lapsed
US
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Digital data transmission system having means for automatically switching the status of input-output control units
Assignee: Unisys Corp
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Filing: 1967-03-27
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Granted: 1970-05-12
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Expires: 1987-03-27
Abstract
No abstract record available.
Inventors
- 👤 James Russell Bennett
- 👤 Kenneth O James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:46
CPC Classifications
G; G06; G06F; G06F13/00; G06F13/38; G06F13/382; G06F13/385; G06F13/10; G06F13/12; G06F13/122; G06F13/14; G06F13/20; G06F13/22
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) | 1973-05-11 | 1973-11-10 | 1974-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-11 | 1977-11-10 | 1978-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-11 | 1981-11-10 | 1982-05-12 | $7700.00 | Window Closed / Lapsed |