US3208230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic continuous feedback process control
Assignee: Phillips Petroleum Co
•
Filing: 1960-02-29
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Granted: 1965-09-28
•
Expires: 1980-02-29
Abstract
No abstract record available.
Inventors
- 👤 Melvin M Fourroux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:30
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/42; B01D3/4211; B01D3/425
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
IN THE OPERATION OF A FLUID MIXTURE PROCESS HAVING A PROCESS CONTROL VARIABLE, A METHOD OF CONTROLLING SAID VARIABLE SO AS TO MAINTAIN A PREDETERMINED VALUE FOR A DESIRED RATIO OF THE CONCENTRATION OF SELECTED CONSTITUENTS IN SAID FLUID MIXTURE AT A PREDETERMINED POINT IN SAID PROCESS, COMPRISING: WITHDRAWING SAMPLES OF SAID FLUID MIXTURE FROM SAID PROCESS, SUBJECTING SAID SAMPLES TO CYCLIC CHROMATOGRAPHIC ANALYSIS TO DETERMINE THE CONCENTRATIONS OF SAID CONSTITUENTS IN SAID SAMPLES, COMPUTING THE VALUE OF SAID RATIO OF SAID CONSTITUENTS IN SAMPLES, AND CONTROLLING SAID PROCESS VARIABLE IN ACCORDANCE WITH SAID COMPUTED VALUE TO MAINTAIN SAID PREDETERMINED VALUE FOR SAID RATIO AT SAID POINT IN SAID PROCESS.
Claim 2
Dependent Claim
110 words
IN THE OPERATION OF A FLUID MIXTURE PROCESS HAVING A PROCESS CONTROL VARIABLE, A METHOD OF CONTROLLING SAID VARIABLE SO AS TO MAINTAIN A PREDETERMINED VALUE FOR A DESIRED RATIO OF THE CONCENTRATION OF SELECTED CONSTITUENTS IN SAID FLUID MIXTURE AT A PREDETERMINED POINT IN SAID PROCESS, COMPRISING: WITHDRAWING SAMPLES OF SAID FLUID MIXTURE FROM SAID PROCESS, SUBJECTING SAID SAMPLES TO CYCLIC CHROMATOGRAPHIC ANALYSIS TO DETERMINE THE CONCENTRATIONS OF SAID CONSTITUENTS IN SAID SAMPLES, COMPUTING THE VALUE OF SAID RATIO OF SAID CONSTITUENTS IN SAMPLES, AND CONTROLLING SAID PROCESS VARIABLE IN ACCORDANCE WITH SAID COMPUTED VALUE TO MAINTAIN SAID PREDETERMINED VALUE FOR SAID RATIO AT SAID POINT IN SAID PROCESS.
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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) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |