Patent US3445819A successfully refreshed from Google Patents.
US3445819A
Expired / Lapsed
US
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Multi-system sharing of data processing units
Assignee: International Business Machines Corp
•
Filing: 1966-08-03
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Granted: 1969-05-20
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Expires: 1986-08-03
Abstract
No abstract record available.
Inventors
- 👤 James C Cooper
- 👤 William P Wissick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:42
CPC Classifications
G; G06; G06F; G06F15/00; G06F15/16; G06F13/00; G06F13/14; G06F13/20; G06F13/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3226689A
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US3226692A
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US3214739A
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US3303472A
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US3274561A
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US3263219A
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US3309672A
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US3295108A
Cited
US3278906A
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US3302182A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |