Patent US2991375A successfully refreshed from Google Patents.
US2991375A
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US
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Transistor triggered multistable circuit
Assignee: Unisys Corp
•
Filing: 1958-02-10
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Granted: 1961-07-04
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Expires: 1978-02-10
Abstract
No abstract record available.
Inventors
- 👤 Abraham David
- 👤 Juan F Bellantoni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:39
CPC Classifications
H; H03; H03K; H03K23/00; H03K23/40; H03K23/50; H03K23/54; H03K29/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2589240A
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US2531076A
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US2614141A
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US2620448A
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US2698386A
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US2812436A
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US2759104A
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US2802941A
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US2787712A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |