Patent US3225292A successfully refreshed from Google Patents.
US3225292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Current regulator
Assignee: Hitachi Ltd
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Filing: 1962-06-05
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Granted: 1965-12-21
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Expires: 1982-06-05
Abstract
No abstract record available.
Inventors
- 👤 Miura Takeo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:08
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/56; G05F1/561
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
A CURRENT REGULATOR WHICH COMPRISES AN AMPLIFIER HAVING A FIRST AND A SECOND CONTROL INPUT TERMINAL AND AN OUTPUT TERMINAL; SAID AMPLIFIER GENERATING A CONTROL VOLTAGE CORRESPONDING TO THE DIFFERENCE BETWEEN THE INPUT VOLTAGES HAVING THE SAME POLARITY AND APPLIED ON SAID INPUT TERMINALS; A NEGATIVE FEEDBACK RESISTANCE CONNECTED BETWEEN SAID OUTPUT TERMINAL AND SAID FIRST INPUT TERMINAL; A RESISTANCE ADAPTED TO DETERMINE THE CONVERSION COEFFICIENT; A LOAD RESISTANCE; A POSITIVE FEEDBACK RESISTANCE CONNECTED TO SAID SECOND INPUT TERMINAL AND SAID OUTPUT TERMINAL; AND AN INPUT RESISTANCE CONNECTED TO SAID FIRST INPUT TERMINAL; SAID RESISTANCE FOR DETERMINING THE CONVERSION COEFFICIENT BEING DISPOSED BETWEEN SAID OUTPUT TERMINAL AND SAID LOAD RESISTANCE; AND SAID LOAD RESISTANCE BEING DISPOSED AT A JUNCTION OF SAID RESISTANCE FOR DETERMINING THE CONVERSION COEFFICIENT AND SAID POSITIVE FEEDBACK RESISTANCE; SAID NEGATIVE AND POSITIVE FEEDBACK RESISTANCES BEING EQUAL TO EACH OTHER SO THAT A CURRENT PROPORTIONAL TO THE INPUT VOLTAGE APPLIED ON SAID INPUT RESISTANCE IS CAUSED TO FLOW THROUGH SAID LOAD.
Claim 2
Dependent Claim
164 words
A CURRENT REGULATOR WHICH COMPRISES AN AMPLIFIER HAVING A FIRST AND A SECOND CONTROL INPUT TERMINAL AND AN OUTPUT TERMINAL; SAID AMPLIFIER GENERATING A CONTROL VOLTAGE CORRESPONDING TO THE DIFFERENCE BETWEEN THE INPUT VOLTAGES HAVING THE SAME POLARITY AND APPLIED ON SAID INPUT TERMINALS; A NEGATIVE FEEDBACK RESISTANCE CONNECTED BETWEEN SAID OUTPUT TERMINAL AND SAID FIRST INPUT TERMINAL; A RESISTANCE ADAPTED TO DETERMINE THE CONVERSION COEFFICIENT; A LOAD RESISTANCE; A POSITIVE FEEDBACK RESISTANCE CONNECTED TO SAID SECOND INPUT TERMINAL AND SAID OUTPUT TERMINAL; AND AN INPUT RESISTANCE CONNECTED TO SAID FIRST INPUT TERMINAL; SAID RESISTANCE FOR DETERMINING THE CONVERSION COEFFICIENT BEING DISPOSED BETWEEN SAID OUTPUT TERMINAL AND SAID LOAD RESISTANCE; AND SAID LOAD RESISTANCE BEING DISPOSED AT A JUNCTION OF SAID RESISTANCE FOR DETERMINING THE CONVERSION COEFFICIENT AND SAID POSITIVE FEEDBACK RESISTANCE; SAID NEGATIVE AND POSITIVE FEEDBACK RESISTANCES BEING EQUAL TO EACH OTHER SO THAT A CURRENT PROPORTIONAL TO THE INPUT VOLTAGE APPLIED ON SAID INPUT RESISTANCE IS CAUSED TO FLOW THROUGH SAID LOAD.
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) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |