Patent US3497760A successfully refreshed from Google Patents.
US3497760A
Expired / Lapsed
US
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Logical expansion circuitry for display systems
Assignee: Unisys Corp
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Filing: 1968-06-10
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Granted: 1970-02-24
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Expires: 1988-06-10
Abstract
No abstract record available.
Inventors
- 👤 Charles A Kiesling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:51
CPC Classifications
G; G09; G09G; G09G1/00; G09G1/06; G09G1/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2543719A
Cited
US2580977A
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US2849609A
Cited
US3056918A
Cited
US3119949A
Cited
US3432873A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-23 | 1973-08-25 | 1974-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-23 | 1977-08-25 | 1978-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-23 | 1981-08-25 | 1982-02-24 | $7700.00 | Window Closed / Lapsed |