Patent US3313985A successfully refreshed from Google Patents.
US3313985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid state d.c. circuit breaker
Assignee: Dickson Electronics Corp
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Filing: 1964-04-03
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Granted: 1967-04-11
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Expires: 1984-04-03
Abstract
No abstract record available.
Inventors
- 👤 Richard L White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:11
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/313; H03K3/315
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
IN A SOLID STATE D.C. CIRCUIT BREAKER THE COMBINATION COMPRISING: (A) A FIRST AND A SECOND TRANSISTOR EACH HAVING A COLLECTOR ELECTRODE, AN EMITTER ELECTRODE, AND A BASE ELECTRODE, SAID TRANSISTORS BEING OF COMPLEMENTARY TYPES; (B) MEANS CONNECTING THE COLLECTOR ELECTRODE OF EACH TRANSISTOR TO THE BASE ELECTRODE OF THE OTHER TRANSISTOR; (C) A CAPACITOR CONNECTED BETWEEN THE EMITTER ELECTRODES OF SAID TRANSISTORS; (D) A FIRST AND A SECOND TERMINAL; (E) A DEVICE EXHIBITING A NEGATIVE RESISTANCE ALONG ONLY A PORTION OF ITS VOLT-AMPERE CHARACTERISTIC CONNECTED IN SERIES BETWEEN SAID FIRST TERMINAL AND THE EMITTER ELECTRODE OF SAID FIRST TRANSISTOR; (F) A VOLTAGE DROPPING DEVICE CONNECTED IN SERIES BETWEEN SAID FIRST TERMINAL AND THE BASE ELECTRODE OF SAID FIRST TRANSISTOR, AND (G) MEANS CONNECTING THE EMITTER ELECTRODE OF SAID SECOND TRANSISTOR TO SAID SECOND TERMINAL.
Claim 2
Dependent Claim
135 words
IN A SOLID STATE D.C. CIRCUIT BREAKER THE COMBINATION COMPRISING: (A) A FIRST AND A SECOND TRANSISTOR EACH HAVING A COLLECTOR ELECTRODE, AN EMITTER ELECTRODE, AND A BASE ELECTRODE, SAID TRANSISTORS BEING OF COMPLEMENTARY TYPES; (B) MEANS CONNECTING THE COLLECTOR ELECTRODE OF EACH TRANSISTOR TO THE BASE ELECTRODE OF THE OTHER TRANSISTOR; (C) A CAPACITOR CONNECTED BETWEEN THE EMITTER ELECTRODES OF SAID TRANSISTORS; (D) A FIRST AND A SECOND TERMINAL; (E) A DEVICE EXHIBITING A NEGATIVE RESISTANCE ALONG ONLY A PORTION OF ITS VOLT-AMPERE CHARACTERISTIC CONNECTED IN SERIES BETWEEN SAID FIRST TERMINAL AND THE EMITTER ELECTRODE OF SAID FIRST TRANSISTOR; (F) A VOLTAGE DROPPING DEVICE CONNECTED IN SERIES BETWEEN SAID FIRST TERMINAL AND THE BASE ELECTRODE OF SAID FIRST TRANSISTOR, AND (G) MEANS CONNECTING THE EMITTER ELECTRODE OF SAID SECOND TRANSISTOR TO SAID SECOND TERMINAL.
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) | 1970-04-10 | 1970-10-10 | 1971-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-10 | 1974-10-10 | 1975-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-10 | 1978-10-10 | 1979-04-11 | $7700.00 | Window Closed / Lapsed |