US3328664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor reverse current protective circuit
Assignee: Allis Chalmers Corp
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Filing: 1964-05-08
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Granted: 1967-06-27
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Expires: 1984-05-08
Abstract
No abstract record available.
Inventors
- 👤 Baude John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:51
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/53; H02M7/537; H02M7/538; H02M7/53803; H02M7/53806
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
IN A CIRCUIT WHEREIN A POWER TRANSISTOR RECEIVES SIGNIFICANT REVERSE CURRENTS ACROSS ITS OUTPUT CIRCUIT WHEN TURNED ON, MEANS FOR LIMITING THE REVERSE CURRENT FLOW THROUGH THE TRANSISTOR COMPRISING: A DIODE CONNECTED ACROSS THE OUTPUT CIRCUIT OF THE TRANSISTOR, SAID DIODE CONNECTED TO PROVIDE A LOW RESISTANCE PATH FOR REVERSE CURRENTS TO BYPASS THE OUTPUT CIRCUIT OF THE TRANSISTOR, AND MEANS FOR SUBSTANTIALLY CONTINUOUSLY FORWARD BIASING THE DIODE A PRESELECTED AMOUNT.
Claim 2
Dependent Claim
71 words
IN A CIRCUIT WHEREIN A POWER TRANSISTOR RECEIVES SIGNIFICANT REVERSE CURRENTS ACROSS ITS OUTPUT CIRCUIT WHEN TURNED ON, MEANS FOR LIMITING THE REVERSE CURRENT FLOW THROUGH THE TRANSISTOR COMPRISING: A DIODE CONNECTED ACROSS THE OUTPUT CIRCUIT OF THE TRANSISTOR, SAID DIODE CONNECTED TO PROVIDE A LOW RESISTANCE PATH FOR REVERSE CURRENTS TO BYPASS THE OUTPUT CIRCUIT OF THE TRANSISTOR, AND MEANS FOR SUBSTANTIALLY CONTINUOUSLY FORWARD BIASING THE DIODE A PRESELECTED AMOUNT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-26 | 1970-12-26 | 1971-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-26 | 1974-12-26 | 1975-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-26 | 1978-12-26 | 1979-06-27 | $7700.00 | Window Closed / Lapsed |