US3023160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refining of hydrocarbons
Assignee: Universal Oil Products Co
•
Filing: 1959-10-09
•
Granted: 1962-02-27
•
Expires: 1979-10-09
Abstract
No abstract record available.
Inventors
- 👤 Russell F Stedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:13
CPC Classifications
C; C10; C10G; C10G17/00; C10G17/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
IN THE FRACTIONATION AT AN ELEVATED TEMPERATURE OF A HYDROCARBON ADMIXED WITH AT LEAST ONE IMPURITY SELECTED FROM THE GROUP CONSISTING OF NITROGEN-CONTAINING, SULFUR-CONTAINING AND OXYGEN-CONTAINING COMPOUNDS, THE IMPROVEMENT WHICH COMPRISES CONDUCTING SAID FRACTIONATION IN A VERTICAL FRACTIONATION ZONE IN THE PRESENCE OF AN ORGANIC ACID ANYDRIDE SELECTED FROM THE GROUP CONSISTING OF ACETIC, PROPIONIC, BUTYRIC, VALERIC, STEARIC, PHTHALIC AND BENZOIC ANHYDRIDES IN A CONCENTRATION SUFFICIENT TO REACT WITH AT LEAST A PORTION OF SAID IMPURITY AND TO THEREBY FORM A HIGHER BOILING REACTION PRODUCT, WITHDRAWING FROM THE UPPER PORTION OF SAID FRACTIONATION ZONE A LIGHT VAPOROUS HYDROCARBON FRACTION REDUCED IN SAID IMPURITY, AND SEPARATELY WITHDRAWING FROM THE LOWER PORTION OF SAID ZONE A HEAVIER RESIDUAL FRACTION CONTAINING SAID REACTION PRODUCT.
Claim 2
Dependent Claim
121 words
IN THE FRACTIONATION AT AN ELEVATED TEMPERATURE OF A HYDROCARBON ADMIXED WITH AT LEAST ONE IMPURITY SELECTED FROM THE GROUP CONSISTING OF NITROGEN-CONTAINING, SULFUR-CONTAINING AND OXYGEN-CONTAINING COMPOUNDS, THE IMPROVEMENT WHICH COMPRISES CONDUCTING SAID FRACTIONATION IN A VERTICAL FRACTIONATION ZONE IN THE PRESENCE OF AN ORGANIC ACID ANYDRIDE SELECTED FROM THE GROUP CONSISTING OF ACETIC, PROPIONIC, BUTYRIC, VALERIC, STEARIC, PHTHALIC AND BENZOIC ANHYDRIDES IN A CONCENTRATION SUFFICIENT TO REACT WITH AT LEAST A PORTION OF SAID IMPURITY AND TO THEREBY FORM A HIGHER BOILING REACTION PRODUCT, WITHDRAWING FROM THE UPPER PORTION OF SAID FRACTIONATION ZONE A LIGHT VAPOROUS HYDROCARBON FRACTION REDUCED IN SAID IMPURITY, AND SEPARATELY WITHDRAWING FROM THE LOWER PORTION OF SAID ZONE A HEAVIER RESIDUAL FRACTION CONTAINING SAID REACTION PRODUCT.
References Cited (Backward Citations)
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Cited
US2098059A
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US2068850A
Cited
US2511251A
Cited
US2567174A
Cited
US2768122A
Cited
US2773805A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-26 | 1965-08-28 | 1966-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-26 | 1969-08-28 | 1970-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-26 | 1973-08-28 | 1974-02-27 | $7700.00 | Window Closed / Lapsed |