Patent US2769768A successfully refreshed from Google Patents.
US2769768A
Expired / Lapsed
US
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Method of removing high molecular weight naphthenic acids from hydrocarbon oils
Assignee: Pure Oil Co
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Filing: 1954-05-07
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Granted: 1956-11-06
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Expires: 1974-05-07
Abstract
No abstract record available.
Inventors
- 👤 William L Fierce
- 👤 Gifford W Crosby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:23
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
THE METHOD OF EXTRACTING ACIDIC MATERIALS OF HIGH MOLECULAR WEIGHT FROM HYDROCARBON MIXTURES COMPRISING CONTACTING SAID HYDROCARBON MIXTURES WITH A SOLVENT COMPRISING METHYL ALCOHOL, AT LEAST ONE ALCOHOL SELECTED FROM THE GROUP CONSISTING OF STRAIGHT CHAIN MONOHYDRIC PRIMARY ALCOHOLS HAVING 4 TO 7 CARBON ATOMS PER MOLECULE AND BRANCHED CHAIN MONOHYDRIC PRIMARY ALCOHOLS HAVING 5 TO 7 CARBON ATOMS PER MOLECULE AND MIXTURES THEREOF, AND A SUFFICIENT AMOUNT OF A BASIC AGENT TO SUBSTANTIALLY NEUTRALIZE THE ACID MATERIALS AND RECOVERING AS THE RAFFINATE A HYDROCARBON MIXTURE SUBSTANTIALLY REDUCED IN ITS CONTENT OF ACIDIC MATERIALS.
Claim 2
Independent Claim
94 words
THE METHOD OF EXTRACTING ACIDIC MATERIALS OF HIGH MOLECULAR WEIGHT FROM HYDROCARBON MIXTURES COMPRISING CONTACTING SAID HYDROCARBON MIXTURES WITH A SOLVENT COMPRISING METHYL ALCOHOL, AT LEAST ONE ALCOHOL SELECTED FROM THE GROUP CONSISTING OF STRAIGHT CHAIN MONOHYDRIC PRIMARY ALCOHOLS HAVING 4 TO 7 CARBON ATOMS PER MOLECULE AND BRANCHED CHAIN MONOHYDRIC PRIMARY ALCOHOLS HAVING 5 TO 7 CARBON ATOMS PER MOLECULE AND MIXTURES THEREOF, AND A SUFFICIENT AMOUNT OF A BASIC AGENT TO SUBSTANTIALLY NEUTRALIZE THE ACID MATERIALS AND RECOVERING AS THE RAFFINATE A HYDROCARBON MIXTURE SUBSTANTIALLY REDUCED IN ITS CONTENT OF ACIDIC MATERIALS.
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) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |