US3134023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protection of transistor circuits against predictable overloading
Assignee: International Business Machines Corp
•
Filing: 1958-04-11
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Granted: 1964-05-19
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Expires: 1978-04-11
Abstract
No abstract record available.
Inventors
- 👤 Louis A Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:13
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/08; H03K17/081; H03K17/0814; H03K17/08146
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A CONTROL CIRCUIT COMPRISING, IN COMBINATION, A SEMICONDUCTOR CIRCUIT ELEMENT, A SOURCE OF POTENTIAL HAVING A PREDETERMINED MAGNITUDE, AN INDUCTIVE ELEMENT, MEANS INCLUDING SAID SOURCE OF POTENTIAL FOR PROVIDING CURRENT FLOW THROUGH SAID SEMICONDUCTOR CIRCUIT ELEMENT, MEANS COUPLING SAID INDUCTIVE ELEMENT TO SAID MEANS FOR PROVIDING CURRENT FLOW THROUGH SAID SEMICONDUCTOR CIRCUIT ELEMENT AND MEANS INDEPENDENT OF THE MAGNETIC STATE OF THE INDUCTIVE ELEMENT FOR SELECTIVELY CHANGING THE MAGNITUDE OF SAID SOURCE OF POTENTIAL AT TIMES CORRESPONDING TO CERTAIN CHANGES IN MAGNETIC STATE OF SAID INDUCTIVE ELEMENT.
Claim 2
Dependent Claim
87 words
A CONTROL CIRCUIT COMPRISING, IN COMBINATION, A SEMICONDUCTOR CIRCUIT ELEMENT, A SOURCE OF POTENTIAL HAVING A PREDETERMINED MAGNITUDE, AN INDUCTIVE ELEMENT, MEANS INCLUDING SAID SOURCE OF POTENTIAL FOR PROVIDING CURRENT FLOW THROUGH SAID SEMICONDUCTOR CIRCUIT ELEMENT, MEANS COUPLING SAID INDUCTIVE ELEMENT TO SAID MEANS FOR PROVIDING CURRENT FLOW THROUGH SAID SEMICONDUCTOR CIRCUIT ELEMENT AND MEANS INDEPENDENT OF THE MAGNETIC STATE OF THE INDUCTIVE ELEMENT FOR SELECTIVELY CHANGING THE MAGNITUDE OF SAID SOURCE OF POTENTIAL AT TIMES CORRESPONDING TO CERTAIN CHANGES IN MAGNETIC STATE OF SAID INDUCTIVE ELEMENT.
References Cited (Backward Citations)
US2655608A
Cited
US2710928A
Cited
US2772370A
Cited
US2884545A
Cited
US2798169A
Cited
US2809303A
Cited
US2832900A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |