US2768931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
In a lead sulfide sweetening process adding dissolved lead oxide to maintain activity of lead sulfide
Assignee: Sinclair Refining Co
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Filing: 1954-07-19
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Granted: 1956-10-30
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Expires: 1974-07-19
Abstract
No abstract record available.
Inventors
- 👤 Winston F Ambler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:45
CPC Classifications
C; C10; C10G; C10G27/00; C10G27/04; C10G19/00; C10G19/02; C10G19/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
IN THE METHOD OF REMOVING UNDESIRABLE SULFUR COMPOUNDS FROM A PETROLEUM DISTILLATE WHICH COMPRISES INCORPORATING IN THE DISTILLATE ELEMENTAL SULFUR, SUFFICIENT ALKALINE COMPOUND TO MAINTAIN THE DISTILLATE ALKALINE, DISPERESED WATER AND DISPERED OXYGEN, AND CONTACTING THE RESULTING ALKALINE DISTILLATE WITH A CATALYST COMPOSED OF LEAD SULFIDE ON A SOLID INERT CARRIER THE IMPROVEMENT WHICH COMPRISES ADDING TO THE PETROLEUM DISTILLATE CHARGED AN AMOUNT OF LEAD OXIDE WHICH IS SUFFICIENT TO SUPPLY LEAD TO VALUES TO THE CATALYST AND WHICH DOES NOT EXCEED THE AMOUNT WHICH IS SOLUBLE IN THE CHARGED MIXTURE.
Claim 2
Dependent Claim
91 words
IN THE METHOD OF REMOVING UNDESIRABLE SULFUR COMPOUNDS FROM A PETROLEUM DISTILLATE WHICH COMPRISES INCORPORATING IN THE DISTILLATE ELEMENTAL SULFUR, SUFFICIENT ALKALINE COMPOUND TO MAINTAIN THE DISTILLATE ALKALINE, DISPERESED WATER AND DISPERED OXYGEN, AND CONTACTING THE RESULTING ALKALINE DISTILLATE WITH A CATALYST COMPOSED OF LEAD SULFIDE ON A SOLID INERT CARRIER THE IMPROVEMENT WHICH COMPRISES ADDING TO THE PETROLEUM DISTILLATE CHARGED AN AMOUNT OF LEAD OXIDE WHICH IS SUFFICIENT TO SUPPLY LEAD TO VALUES TO THE CATALYST AND WHICH DOES NOT EXCEED THE AMOUNT WHICH IS SOLUBLE IN THE CHARGED MIXTURE.
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) | 1959-10-30 | 1960-04-30 | 1960-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-30 | 1964-04-30 | 1964-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-30 | 1968-04-30 | 1968-10-30 | $7700.00 | Window Closed / Lapsed |