Patent US3566282A successfully refreshed from Google Patents.
US3566282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Analog controller including manual pulse-train control
Assignee: Monsanto Co
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Filing: 1968-06-25
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Granted: 1971-02-23
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Expires: 1988-06-25
Abstract
Abstract AN ELECTRONIC ANALOG CONTROLLER INCLUDING COMPARATOR AMPLIFIER CIRCUITRY FOR COMPARING THE SET POINT VALUE OF A PROCESS TO THE PROCESS VARIABLE. THE COMPARATOR OUTPUT SIGNAL IS COUPLED TO THE INPUT OF AN INTEGRATING AMPLIFIER CIRCUIT, WHICH INTEGRATING AMPLIFIER PROVIDES THE DESIRED PROCESS LOAD CURRENT. A PULSE WHEEL, PULSE SHAPING, AND POLARITY CIRCUITRY ARE EMPLOYED TO GENERATE UNIFORM PULSES WHICH ARE APPLIED TO THE INPUT OF THE INTEGRATING AMPLIFIER WHEN IT IS DESIRED TO MANUALLY CONTROL THE OUTPUT THEREOF.
Inventors
- 👤 Verlin A Lauher
- 👤 Louis H Fricke Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:42
CPC Classifications
G; G05; G05B; G05B11/00; G05B11/01; G05B11/26; G05B7/00; G05B7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |