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US2959687A
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Switching devices
Assignee: Unisys Corp
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Filing: 1956-09-21
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Granted: 1960-11-08
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Expires: 1976-09-21
Abstract
No abstract record available.
Inventors
- 👤 Jr John Presper Eckert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:46
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/48; G06F7/50; G06F7/501; G06F7/502; G06F7/383; H; H03; H03K; H03K19/00; H03K19/02; H03K19/08; H03K19/082; H03K19/084; H03K19/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB172350A
Cited
US2693907A
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US2594449A
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US2644892A
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US2783384A
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US2773200A
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US2808990A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-08 | 1964-05-09 | 1964-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-08 | 1968-05-09 | 1968-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-08 | 1972-05-09 | 1972-11-08 | $7700.00 | Window Closed / Lapsed |