Patent US3259554A successfully refreshed from Google Patents.
US3259554A
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Fractionation control method
Assignee: Phillips Petroleum Co
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Filing: 1963-10-09
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Granted: 1966-07-05
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Expires: 1983-10-09
Abstract
No abstract record available.
Inventors
- 👤 George J Constantikes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:13
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/42; B01D3/4211; B01D3/4255; Y; Y10; Y10S; Y10S203/00; Y10S203/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A PROCESS WHICH COMPRISES PASSING A FEED MIXTURE TO A FRACTIONATION ZONE, WITH DRAWING A FIRST FRACTION FROM THE UPPER REGION OF SAID FRACTIONATION ZONE, WITHDRAWING A SECOND FRACTION FROM THE LOWER REGION OF SAID FRACTIONATION ZONE, WITHDRAWING A THIRD FRACTION FROM AN INTERMEDIATE REGION OF SAID FRACTIONATION ZONE, MEASURIN A PROPERTY OF SAID FEED MIXTURE REPRESENTATIVE OF
Claim 2
Dependent Claim
58 words
A PROCESS WHICH COMPRISES PASSING A FEED MIXTURE TO A FRACTIONATION ZONE, WITH DRAWING A FIRST FRACTION FROM THE UPPER REGION OF SAID FRACTIONATION ZONE, WITHDRAWING A SECOND FRACTION FROM THE LOWER REGION OF SAID FRACTIONATION ZONE, WITHDRAWING A THIRD FRACTION FROM AN INTERMEDIATE REGION OF SAID FRACTIONATION ZONE, MEASURIN A PROPERTY OF SAID FEED MIXTURE REPRESENTATIVE OF
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) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |