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Patent US3390379A successfully refreshed from Google Patents.
US3390379A
Expired / Lapsed
US
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Data communication system
Assignee: Unisys Corp
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Filing: 1965-07-26
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Granted: 1968-06-25
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Expires: 1985-07-26
Abstract
No abstract record available.
Inventors
- 👤 Carl B Carlson
- 👤 Richard S Sharp
- 👤 James E Wollum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:23
CPC Classifications
G; G06; G06F; G06F13/00; G06F13/38; G06F13/382; G06F13/385; H; H04; H04L; H04L13/00; H04L13/02; H04L13/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3029414A
Cited
US3095553A
Cited
US3305839A
Cited
US3312945A
Cited
US3303475A
Cited
US3312950A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-25 | 1971-12-25 | 1972-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-25 | 1975-12-25 | 1976-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-25 | 1979-12-25 | 1980-06-25 | $7700.00 | Window Closed / Lapsed |