Patent CA577824A successfully refreshed from Google Patents.
Patent US3174298A successfully refreshed from Google Patents.
US3174298A
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Process controller
Assignee: Phillips Petroleum Co
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Filing: 1962-01-02
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Granted: 1965-03-23
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Expires: 1982-01-02
Abstract
No abstract record available.
Inventors
- 👤 Louis D Kleiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:34
CPC Classifications
G; G05; G05B; G05B11/00; G05B11/01; G05B11/32; G05D; G05D23/00; G05D23/19; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2409; Y10T137/2496; Y10T137/2514
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
160 words
A PROCESS CONTROLLER COMPRISING ERROR MEASURING MEANS ADAPTED TO RECEIVE A FIRST SIGNAL REPRESENTATIVE OF A FIRST PROCESS CONDITION TO BE REGULATED AND A SECOND SIGNAL REPRESENTATIVE OF A PREDETERMINED SET POINT AND TO ESTABLISH AN OTUPUT SIGNAL WHICH IS REPRESENTATIVE OF THE DIFFERENCE BETWEEN SAID FIRST AND SECOND SIGNALS; INLET MEANS, INDEPENDENT OF SAID FIRST AND OUTPUT SIGNALS, ADAPTED TO RECEIVE A THIRD SIGNAL WHICH IS REPRESENTATIVE OF A SECOND PROCESS CONDITION; FIRST ADJUSTING MEANS RESPONSIVE TO A THIRD SIGNAL RECEIVED BY SAID INLET MEANS TO VARY SAID OUTPUT SIGNAL AS A DIRECT FUNCTION OF SAID THIRD SIGNAL; MEANS TO VARY THE RATE AT WHICH SAID OUTPUT SIGNAL IS VAREIED BY SAID FIRST ADJUSTING MEANS; SECOND ADJUSTING MEANS RESPONSIVE TO A THIRD SIGNAL RECEIVED BY SAID INLET MEANS TO VARY SAID OUTPUT SIGNAL AS AN INVERSE FUNCTION OF SAID THIRD SIGNAL; AND MEANS TO VARY THE RATE AT WHICH SAID OUTPUT SIGNAL IS VARIED BY SAID SECOND ADJUSTING MEANS.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-22 | 1968-09-21 | 1969-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-22 | 1972-09-21 | 1973-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-22 | 1976-09-21 | 1977-03-23 | $7700.00 | Window Closed / Lapsed |