US3274561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data processor input/output control system
Assignee: Unisys Corp
•
Filing: 1962-11-30
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Granted: 1966-09-20
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Expires: 1982-11-30
Abstract
No abstract record available.
Inventors
- 👤 Hallman Henry Raymond
- 👤 Jr Leonard H Sichel
- 👤 Cornelius C Perkins
- 👤 Stanley J Pezely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:18
CPC Classifications
G; G06; G06F; G06F9/00; G06F9/06; G06F9/46; G06F9/48; G06F9/4806; G06F9/4812; G06F13/00; G06F13/10; G06F13/12; G06F13/122; G06F15/00; G06F15/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3079082A
Cited
US3029414A
Cited
US3061192A
Cited
US3158844A
Cited
US3201760A
Cited
US3200380A
Cited
US3181124A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |