US2634231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sweetening of sour hydrocarbon distillates
Assignee: Universal Oil Products Co
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Filing: 1951-04-16
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Granted: 1953-04-07
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Expires: 1971-04-16
Abstract
No abstract record available.
Inventors
- 👤 Warren W Johnstone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:03
CPC Classifications
C; C10; C10G; C10G27/00; C10G27/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
100 words
A METHOD OF REFINING A SOUR HYDROCARBON DISTILLATE WHICH COMPRISES CONTACTING THE DISTILLATE WHICH AN ALKALINE RAGENT IN A TREATING ZONE, MAINTAINING THE THUS THREATED DISTILLATE IN CONTACT WITH AIR AND A PHENYLENE DIAMINE SWEETENING AGENT IN A MOLAL QUANTITY IN EXCESS OF THE MOLAL QUANTITY OF MERCAPTANS CONTAINED IN SAID TREATED DISTILLATE, THEREAFTER TREATING THE DISTILLATE WITH AN ACID TO REMOVE EXCESS SWEETENING AGENT FROM THE DISTILLATE, AND SUPPLYING THE ACIDIFIED SWEETENING AGENT TO SAID TREATING ZONE TO RELEASE THE PHENYLENE DIAMINE SWEETENING AGENT AND INCORPORATE THE SAME INTO SOUR DISTILLATE BEING CONTACTED WITH ALKALINE REAGENT IN SAID ZONE.
References Cited (Backward Citations)
US2508817A
Cited
US2552399A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-06 | 1956-10-06 | 1957-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-06 | 1960-10-06 | 1961-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-06 | 1964-10-06 | 1965-04-07 | $7700.00 | Window Closed / Lapsed |