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US2981937A
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Reliability checking circuits
Assignee: Unisys Corp
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Filing: 1956-05-28
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Granted: 1961-04-25
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Expires: 1976-05-28
Abstract
No abstract record available.
Inventors
- 👤 George G Hoberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:55
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/16; G01; G01R; G01R31/00; G01R31/28; G01R31/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2512038A
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US2609143A
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US2570716A
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US2589465A
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US2756409A
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US2696599A
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US2848532A
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US2889534A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |