Patent US3201649A successfully refreshed from Google Patents.
US3201649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor protection circuit
Assignee: Alpha Instrument Inc
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Filing: 1960-04-20
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Granted: 1965-08-17
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Expires: 1980-04-20
Abstract
No abstract record available.
Inventors
- 👤 Ferri Aurelio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:09
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/10; H02H7/12; H02H7/1213
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
IN COMBINATION WITH A TRANSISTORIZED VOLTAGE CONVERTING DEVICE HAVING A LOW, D.C. VOLTAGE SOURCE, A HIGH A.C. VOLTAGE OUTPUT, A RECTIFIER CONNECTING SAID OUTPUT TO A LOAD, A PROTECTIVE SYSTEM FOR THE VOLTAGE CONVERTING DEVICE COMPRISING, MEANS CONDUCTIVELY COUPLING SAID LOW D.C. VOLTAGE SOURCE TO SAID LOAD FOR DEVELOPING A UNIDIRECTIONAL ENERGIZING CURRENT IN RESPONSE TO AN ABNORMALLY LOW IMPEDANCE OF THE LOAD, AND MEANS RESPONSIVE TO SAID ENERGIZING CURRENT IN THE CONDUCTIVE COUPLING MEANS FOR OPEN-CIRCUITING SAID LOW VOLTAGE SOURCE WITH RESPECT TO THE VOLTAGE CONVERTING DEVICE, SAID CONDUCTIVE COUPLING MEANS INCLUDING RECTIFYING MEANS CONNECTING THE OPEN-CIRCUITING MEANS TO THE LOAD PREVENTING FLOW OF CURRENT FROM THE HIGH VOLTAGE OUTPUT TO THE OPEN-CIRCUITING MEANS.
Claim 2
Dependent Claim
115 words
IN COMBINATION WITH A TRANSISTORIZED VOLTAGE CONVERTING DEVICE HAVING A LOW, D.C. VOLTAGE SOURCE, A HIGH A.C. VOLTAGE OUTPUT, A RECTIFIER CONNECTING SAID OUTPUT TO A LOAD, A PROTECTIVE SYSTEM FOR THE VOLTAGE CONVERTING DEVICE COMPRISING, MEANS CONDUCTIVELY COUPLING SAID LOW D.C. VOLTAGE SOURCE TO SAID LOAD FOR DEVELOPING A UNIDIRECTIONAL ENERGIZING CURRENT IN RESPONSE TO AN ABNORMALLY LOW IMPEDANCE OF THE LOAD, AND MEANS RESPONSIVE TO SAID ENERGIZING CURRENT IN THE CONDUCTIVE COUPLING MEANS FOR OPEN-CIRCUITING SAID LOW VOLTAGE SOURCE WITH RESPECT TO THE VOLTAGE CONVERTING DEVICE, SAID CONDUCTIVE COUPLING MEANS INCLUDING RECTIFYING MEANS CONNECTING THE OPEN-CIRCUITING MEANS TO THE LOAD PREVENTING FLOW OF CURRENT FROM THE HIGH VOLTAGE OUTPUT TO THE OPEN-CIRCUITING MEANS.
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) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |