US3654145A
Expired / Lapsed
US
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Discovery in separation of hydrocarbons
Assignee: BP PLC
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Filing: 1969-02-17
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Granted: 1972-04-04
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Expires: 1989-02-17
Abstract
Abstract HYDROCARBON MIXTURES CONTAINING PARAFFINIC AND NAPHTHENIC HYDROCARBONS DIFFERING IN CARBON NUMBER BY AT LEAST 2 ARE SEPARATED INTO FRACTIONS CONSISTING SUBSTANTIALLY OF NAPHTHENIC OR PARAFFINIC HYDROCARBONS OF THE SAME CARBON NUMBER BY PASSING THE MIXTURE IN THE VAPOUR PHASE, TOGETHER WITH AN INERT CARRIER GAS, THROUGH A COLUMN OF A MOLECULAR SIEVE HAVING PORE DIAMETERS GREATER THAN 5 A. THE COLUMN IS TEMPERTURE PROGRAMMED WITHIN THE RANGE 40-250* C. ABOVE THE AVERAGE BOLILING POINT OF THE HIGHEST CARBON NUMBER COMPONENTS PRESENT AND THE FRACTIONS ARE RECOVERED FROM THE BED AS SUCCESSIVE EFFLUENTS.
Inventors
- 👤 John Vincent Brunnock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:40
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/26; G01N30/28; G01N30/30; B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01J20/186; B01J20/281; B01J20/282; C; C07; C07C; C07C7/00; C07C7/135; G01N33/00; G01N33/26; G01N33/28; G01N33/2829; B01J2220/00; B01J2220/50; B01J2220/54; Y; Y10; Y10T; Y10T436/00; Y10T436/21; Y10T436/212; Y10T436/214
Claims Analysis
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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) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |