Patent US3146356A successfully refreshed from Google Patents.
US3146356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Repetitive high current semiconductor switch
Assignee: Garrett Corp
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Filing: 1960-12-14
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Granted: 1964-08-25
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Expires: 1980-12-14
Abstract
No abstract record available.
Inventors
- 👤 Robert L Kidwell
- 👤 Donald E Litherland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:02
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/72; H03K17/722; H03K17/723
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
IN COMBINATION WITH MEANS FOR DIFFERENTATING POSITIVE CURRENT PULSES, A KEYER CIRCUIT FOR CONNECTING A POWER SUPPLY TO A LOAD, COMPRISING: FIRST SEMICONDUCTOR MEANS FOR CONNECTING THE POWER SUPPLY TO THE LOAD WHEN THE LEADING EDGE OF A DIFFERENTIATED POSITIVE PULSE IS FED TO SAID FIRST SEMICONDUCTOR MEANS; A CONDENSER; SECOND SEMICONDUCTOR MEANS FOR CONNECTING SAID CONDENSER TO THE POWER SUPPLY WHEN SAID LEADING EDGE OF THE DIFFERENTIATED POSITIVE PULSE IS FED TO SAID SECOND SEMICONDUCTOR MEANS; AND A THIRD SEMICONDUCTOR MEANS FOR DISCHARGING SAID CONDENSER WHEN THE TRAILING EDGE OF SAID DIFFERENTIATED POSITIVE PULSE IS FED TO SAID THIRD SEMICONDUCTOR MEANS, THEREBY RETURNING SAID FIRST SEMICONDUCTOR TO A BLOCKING STATE AND REMOVING THE POWER FROM THE LOAD.
Claim 2
Dependent Claim
118 words
IN COMBINATION WITH MEANS FOR DIFFERENTATING POSITIVE CURRENT PULSES, A KEYER CIRCUIT FOR CONNECTING A POWER SUPPLY TO A LOAD, COMPRISING: FIRST SEMICONDUCTOR MEANS FOR CONNECTING THE POWER SUPPLY TO THE LOAD WHEN THE LEADING EDGE OF A DIFFERENTIATED POSITIVE PULSE IS FED TO SAID FIRST SEMICONDUCTOR MEANS; A CONDENSER; SECOND SEMICONDUCTOR MEANS FOR CONNECTING SAID CONDENSER TO THE POWER SUPPLY WHEN SAID LEADING EDGE OF THE DIFFERENTIATED POSITIVE PULSE IS FED TO SAID SECOND SEMICONDUCTOR MEANS; AND A THIRD SEMICONDUCTOR MEANS FOR DISCHARGING SAID CONDENSER WHEN THE TRAILING EDGE OF SAID DIFFERENTIATED POSITIVE PULSE IS FED TO SAID THIRD SEMICONDUCTOR MEANS, THEREBY RETURNING SAID FIRST SEMICONDUCTOR TO A BLOCKING STATE AND REMOVING THE POWER FROM THE LOAD.
References Cited (Backward Citations)
US2964711A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |