US3238111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Minimization of time lag in the automatic control of a fractional distillation system
Assignee: Phillips Petroleum Co
•
Filing: 1962-06-08
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Granted: 1966-03-01
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Expires: 1982-06-08
Abstract
No abstract record available.
Inventors
- 👤 Kenneth A Harper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:28
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/42; B01D3/4211; B01D3/425; Y; Y10; Y10S; Y10S203/00; Y10S203/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A METHOD FOR OPERATING A FRACTIONAL DISTILLATION COLUMN COMPRISING INTRODUCTING INTO SAID COLUMN A FEED STOCK TO BE FRACTINALLY DISTILLED AND THEREIN FRACTIONALLY DISTILLING SAID FEEDSTOCK, WITHDRAWING AN OVERHEAD VAPOROUS STREAM FROM A UPPER PORTION OF SAID COLUMN, COOLING SAID OVERHEAD VAPOROUS STREAM TO CONDENSE AT LEAST A PORTION OF SAID OVERHEAD VAPOROUS STREAM TO FORM CONDENSATE, PASSING THE THUS COOLED AND AT LEAST PARTIALLY CONDENSED OVERHEAD VAPOROUS STREAM INTO AN ACCUMULATOR, INTRODUCING AT A SUBSTANTIALLY CONSTANT RATE A PORTION OF SAID CONDENSATE FROM SAID ACCUMULATOR INTO AN UPPER PORTION OF SAID COLUMN AS REFLUX FOR SAID COLUMN, WITHDRAWING THE REMAINDER OF SAID CONDENSATE FROM SAID ACCUMULATOR AS A LIQUID OVERHEAD PRODUCT, ADDING REBOIL-
Claim 2
Independent Claim
114 words
A METHOD FOR OPERATING A FRACTIONAL DISTILLATION COLUMN COMPRISING INTRODUCTING INTO SAID COLUMN A FEED STOCK TO BE FRACTINALLY DISTILLED AND THEREIN FRACTIONALLY DISTILLING SAID FEEDSTOCK, WITHDRAWING AN OVERHEAD VAPOROUS STREAM FROM A UPPER PORTION OF SAID COLUMN, COOLING SAID OVERHEAD VAPOROUS STREAM TO CONDENSE AT LEAST A PORTION OF SAID OVERHEAD VAPOROUS STREAM TO FORM CONDENSATE, PASSING THE THUS COOLED AND AT LEAST PARTIALLY CONDENSED OVERHEAD VAPOROUS STREAM INTO AN ACCUMULATOR, INTRODUCING AT A SUBSTANTIALLY CONSTANT RATE A PORTION OF SAID CONDENSATE FROM SAID ACCUMULATOR INTO AN UPPER PORTION OF SAID COLUMN AS REFLUX FOR SAID COLUMN, WITHDRAWING THE REMAINDER OF SAID CONDENSATE FROM SAID ACCUMULATOR AS A LIQUID OVERHEAD PRODUCT, ADDING REBOIL-
References Cited (Backward Citations)
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US2456398A
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US2725351A
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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) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |