Patent US3448393A successfully refreshed from Google Patents.
US3448393A
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US
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Assignee: Schneider Electric Systems USA Inc
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Filing: 1965-07-27
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Granted: 1969-06-03
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Expires: 1985-07-27
Abstract
No abstract record available.
Inventors
- 👤 Willard W Rice Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:17
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/38; H03F3/387; G; G01; G01N; G01N30/00; G01N30/02; G01N30/86; G01N30/8624; G01N30/8641; H03F1/00; H03F1/30; H03F1/303
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
AN INPUT REFERENCE LEVEL COMPENSATION DEVICE COMPRISING: AN AMPLIFIER HAVING AN INPUT TERMINAL AND AN OUTPUT TERMINAL, NEGATIVE FEEDBACK MEANS HAVING A SIGNAL SUPPLIED FROM SAID OUTPUT TERMINAL THROUGH A FIRST IMPEDANCE TO SAID INPUT TERMINAL, MEANS FOR STORING A LEVEL HAVING A PREDETERMINED RATIO TO THE LEVEL AT SAID OUTPUT TERMINAL AT A PREDETERMINED TIME, MEANS FOR PERIODICALLY ISOLATING SAID MEANS FOR STORING FROM OPERATIVE INTERCONNECTION WITH SAID OUTPUT TERMINAL AND PLACING SAID MEANS FOR STORING IN OPERATIVE INTERCONNECTION WITH SAID INPUT
Claim 2
Dependent Claim
83 words
AN INPUT REFERENCE LEVEL COMPENSATION DEVICE COMPRISING: AN AMPLIFIER HAVING AN INPUT TERMINAL AND AN OUTPUT TERMINAL, NEGATIVE FEEDBACK MEANS HAVING A SIGNAL SUPPLIED FROM SAID OUTPUT TERMINAL THROUGH A FIRST IMPEDANCE TO SAID INPUT TERMINAL, MEANS FOR STORING A LEVEL HAVING A PREDETERMINED RATIO TO THE LEVEL AT SAID OUTPUT TERMINAL AT A PREDETERMINED TIME, MEANS FOR PERIODICALLY ISOLATING SAID MEANS FOR STORING FROM OPERATIVE INTERCONNECTION WITH SAID OUTPUT TERMINAL AND PLACING SAID MEANS FOR STORING IN OPERATIVE INTERCONNECTION WITH SAID INPUT
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) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |