Patent US3363178A successfully refreshed from Google Patents.
US3363178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bridge apparatus for determining the hybrid parameters of a transistor under test
Assignee: ROBERT HENRI BLANC
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Filing: 1961-07-28
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Granted: 1968-01-09
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Expires: 1981-07-28
Abstract
No abstract record available.
Inventors
- 👤 Blanc Robert Henri
- 👤 Brunel Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:19
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/26; G01R31/2607; G01R31/2608
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
109 words
A SYSTEM FOR DETERMINING THE INVERSE VOLTAGE GAIN OF A TRANSISTOR COMPRISING A WHEATSTONE BRIDGE CIRCUIT HAVING A FIRST AND A SECOND PAIR OF OPPOSED TERMINALS, MEANS FOR APPLYING A SIGNAL ACROSS SAID FIRST PAIR OF OPPOSED TERMINALS THEREOF, AND AN INDICATING INSTRUMENTS COUPLED ACROSS SAID SECOND PAIR OF OPPOSED TERMINALS THEREOF, WHEREIN ONE BRANCH OF SAID WHEATSTONE BRIDGE CIRCUIT COUPLED BETWEEN ONE TERMINAL OF EACH OF SAID PAIRS OF TERMINALS COMPRISES THE EMITTER BASE JUNCTION OF THE TRANSISTOR, AND WHEREIN ANOTHER BRANCH OF SAID BRIDGE CIRCUIT COUPLED BETWEEN A FIRST AND A SECOND TERMINAL OF SAID SECOND PAIR OF TERMINALS INCLUDES THE COLLECTOR BASE JUNCTION OF SAID TRANSISTOR.
References Cited (Backward Citations)
US2911594A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-08 | 1971-07-10 | 1972-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-08 | 1975-07-10 | 1976-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-08 | 1979-07-10 | 1980-01-09 | $7700.00 | Window Closed / Lapsed |