US2977289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fractionation process control
Assignee: Phillips Petroleum Co
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Filing: 1958-01-20
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Granted: 1961-03-28
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Expires: 1978-01-20
Abstract
No abstract record available.
Inventors
- 👤 Carl M Kron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:25
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/42; B01D3/4211; B01D3/425; Y; Y10; Y10S; Y10S203/00; Y10S203/19; Y10S208/00; Y10S208/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
IN THE ART OF FRACTIONATING A STREAM CONTAINING ISOHEXANE, NORMAL HEXANE AND A SMALL AMOUNT OF BENZENE, THE STEPS WHICH COMPRISE INTRODUCING SAID STREAM INTO A FRACTIONATION ZONE; CONTROLLING HEAT SUPPLIED TO THE BOTTOM OF SAID ZONE, HEAT WITHDRAWN FROM THE TOP OF SAID ZONE, THE FEED RATE, THE RATE OF WITHDRAWAL OF OVERHEAD PRODUCT AND BOTTOM PRODUCT AND THE REFLUX RATE AS OPERATING VARIABLES TO SEPARATE SAID STREAM INTO AN OVERHEAD PRODUCT CONTAINING ISOHEXANE AND MORE VOLATILE MATERIALS AND A BOTTOM PRODUCT CONTAINING NORMAL HEXANE AND LESS VOLATILE MATERIALS; WITHDRAWING A SAMPLE FROM A REGION OF SAID ZONE LOCATED SUBSTANTIALLY ABOVE THE REGION OF FEED
Claim 2
Dependent Claim
106 words
IN THE ART OF FRACTIONATING A STREAM CONTAINING ISOHEXANE, NORMAL HEXANE AND A SMALL AMOUNT OF BENZENE, THE STEPS WHICH COMPRISE INTRODUCING SAID STREAM INTO A FRACTIONATION ZONE; CONTROLLING HEAT SUPPLIED TO THE BOTTOM OF SAID ZONE, HEAT WITHDRAWN FROM THE TOP OF SAID ZONE, THE FEED RATE, THE RATE OF WITHDRAWAL OF OVERHEAD PRODUCT AND BOTTOM PRODUCT AND THE REFLUX RATE AS OPERATING VARIABLES TO SEPARATE SAID STREAM INTO AN OVERHEAD PRODUCT CONTAINING ISOHEXANE AND MORE VOLATILE MATERIALS AND A BOTTOM PRODUCT CONTAINING NORMAL HEXANE AND LESS VOLATILE MATERIALS; WITHDRAWING A SAMPLE FROM A REGION OF SAID ZONE LOCATED SUBSTANTIALLY ABOVE THE REGION OF FEED
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) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |