Patent US4998653A successfully refreshed from Google Patents.
Patent US2543953A successfully refreshed from Google Patents.
US2543953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sweetening hydrocarbon mixtures
Assignee: ExxonMobil Oil Corp
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Filing: 1947-11-21
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Granted: 1951-03-06
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Expires: 1967-11-21
Abstract
No abstract record available.
Inventors
- 👤 Elwood B Backensto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:49
CPC Classifications
C; C10; C10G; C10G19/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A METHOD OF PRODUCING A PETROLEUM FRACTION NEGATIVE IN THE "DOCTOR TEST" FROM A SOUR PETROLEUM FRACTION CONTAINING NOT MORE THAN ABOUT 0.02 WEIGHT PER CENT OF MERCAPTAN SULFUR WHICH COMPRISES MIXING A SOUR PETROLEUM FRACTION CONTAINING NOT MORE THAN ABOUT 0.02 WEIGHT PER CENT MERCAPTAN SULFUR WITH A DI-SECONDARY BUTYL CATECHOL IN THE PRESENCE OF ALKALI METAL HYDROXIDE.
Claim 2
Independent Claim
59 words
A METHOD OF PRODUCING A PETROLEUM FRACTION NEGATIVE IN THE "DOCTOR TEST" FROM A SOUR PETROLEUM FRACTION CONTAINING NOT MORE THAN ABOUT 0.02 WEIGHT PER CENT OF MERCAPTAN SULFUR WHICH COMPRISES MIXING A SOUR PETROLEUM FRACTION CONTAINING NOT MORE THAN ABOUT 0.02 WEIGHT PER CENT MERCAPTAN SULFUR WITH A DI-SECONDARY BUTYL CATECHOL IN THE PRESENCE OF ALKALI METAL HYDROXIDE.
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) | 1954-03-05 | 1954-09-04 | 1955-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-05 | 1958-09-04 | 1959-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-05 | 1962-09-04 | 1963-03-06 | $7700.00 | Window Closed / Lapsed |