Patent US3134944A successfully refreshed from Google Patents.
US3134944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for testing forward current and peak inverse voltage characteristics of semiconductor power translation devices
Assignee: Daven Co
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Filing: 1960-07-25
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Granted: 1964-05-26
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Expires: 1980-07-25
Abstract
No abstract record available.
Inventors
- 👤 Richard J Newman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:57
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/26; G01R31/2607; G01R31/2632
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A SYSTEM FOR TESTING SEMICONDUCTOR POWER TRANSLATION DEVICES COMPRISING TWO SOURCES OF RELATIVELY LOW ALTERNATING VOLTAGE, EACH SAID SOURCE INCLUDING TWO TERMINALS AND THE VOLTAGES OF SAID SOURCES HAVING THE SAME FREQUENCY AND UNLIKE INSTANTANEOUS RELATIVE POLARITIES WITH RESPECT PRESELECTED ONES OF SAID TERMINALS, METALLIC SUPPORT MEANS HAVING APPRECIABLE ELECTRICAL AND THERMAL CONDUCTIVITY, A PAIR OF LOAD IMPEDANCES INDIVIDUALLY ELECTRICALLY COUPLING SAID PRESELECTED UNLIKE POLARITY TERMINALS OF SAID SOURCES TO ONE TERMINAL OF AN INDIVIDUAL ONE OF A PAIR OF TWO-TERMINAL SEMICONDUCTOR POWER TRANSLATION DEVICES WHICH ARE UNDER TEST AND WHICH HAVE A SECOND ELECTRICAL AND THERMAL DISSIPATION TERMINAL IN INTIMATE ELECTRICAL AND THERMAL ENGAGEMENT WITH SAID SUPPORT
Claim 2
Independent Claim
108 words
A SYSTEM FOR TESTING SEMICONDUCTOR POWER TRANSLATION DEVICES COMPRISING TWO SOURCES OF RELATIVELY LOW ALTERNATING VOLTAGE, EACH SAID SOURCE INCLUDING TWO TERMINALS AND THE VOLTAGES OF SAID SOURCES HAVING THE SAME FREQUENCY AND UNLIKE INSTANTANEOUS RELATIVE POLARITIES WITH RESPECT PRESELECTED ONES OF SAID TERMINALS, METALLIC SUPPORT MEANS HAVING APPRECIABLE ELECTRICAL AND THERMAL CONDUCTIVITY, A PAIR OF LOAD IMPEDANCES INDIVIDUALLY ELECTRICALLY COUPLING SAID PRESELECTED UNLIKE POLARITY TERMINALS OF SAID SOURCES TO ONE TERMINAL OF AN INDIVIDUAL ONE OF A PAIR OF TWO-TERMINAL SEMICONDUCTOR POWER TRANSLATION DEVICES WHICH ARE UNDER TEST AND WHICH HAVE A SECOND ELECTRICAL AND THERMAL DISSIPATION TERMINAL IN INTIMATE ELECTRICAL AND THERMAL ENGAGEMENT WITH SAID SUPPORT
References Cited (Backward Citations)
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US2459849A
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US2736860A
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US2916159A
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US2895106A
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US2868997A
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US2964688A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-26 | 1967-11-25 | 1968-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-26 | 1971-11-25 | 1972-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-26 | 1975-11-25 | 1976-05-26 | $7700.00 | Window Closed / Lapsed |