Patent US199687A successfully refreshed from Google Patents.
Patent CH88000A successfully refreshed from Google Patents.
US2846359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preventing loss of color on aging by treating with alcohol and alkali
Assignee: Sunoco Inc
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Filing: 1955-11-02
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Granted: 1958-08-05
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Expires: 1975-11-02
Abstract
No abstract record available.
Inventors
- 👤 Hugh L Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:25
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
PROCESS FOR REFINING PETROLEUM WHICH COMPRISES: CONTACTING IN LIQUID PHASE A PETROLEUM MATERIAL CONTAINING CONSTITUENTS SELECTED FROM THE GROUP CONSISTING OF NAPHTHENIC ACIDS AND SOAPS THEREOF WITH A TREATING AGENT COMPRISING AN AQUEOUS SOLUTION OF A LOWER ALKANOL; SEPERATING LIQUID PETROLEUM MATERIAL FROM LIQUID TREATING AGENT CONTAINING SOAPS OF SAID NAPHTHENIC ACIDS; SUBSEQUENTLY CONTACTING IN LIQUID PHASE THE PETROLEUM FRACTION FROM WHICH THE NAPHTHENIC ACID DERIVATIVES HAVE BEEN REMOVED WITH A SECOND TREATING AGENT COMPRISING AN AQUEOUS SOLUTION OF A LOWER ALKANOL OF GREATER CONCENTRATION THAN THE FIRST-NAMED SOLUTION, THEREBY TO REMOVE IMPURITIES FROM THE PETROLEUM FRACTION, THE LATTER CONTACTING BEING PERFORMED IN THE PRESENCE OF AN INORGANIC BASE; AND SEPARATING LIQUID PETROLEUM FROM THE SECOND TREATING AGENT IN LIQUID PHASE.
Claim 2
Dependent Claim
121 words
PROCESS FOR REFINING PETROLEUM WHICH COMPRISES: CONTACTING IN LIQUID PHASE A PETROLEUM MATERIAL CONTAINING CONSTITUENTS SELECTED FROM THE GROUP CONSISTING OF NAPHTHENIC ACIDS AND SOAPS THEREOF WITH A TREATING AGENT COMPRISING AN AQUEOUS SOLUTION OF A LOWER ALKANOL; SEPERATING LIQUID PETROLEUM MATERIAL FROM LIQUID TREATING AGENT CONTAINING SOAPS OF SAID NAPHTHENIC ACIDS; SUBSEQUENTLY CONTACTING IN LIQUID PHASE THE PETROLEUM FRACTION FROM WHICH THE NAPHTHENIC ACID DERIVATIVES HAVE BEEN REMOVED WITH A SECOND TREATING AGENT COMPRISING AN AQUEOUS SOLUTION OF A LOWER ALKANOL OF GREATER CONCENTRATION THAN THE FIRST-NAMED SOLUTION, THEREBY TO REMOVE IMPURITIES FROM THE PETROLEUM FRACTION, THE LATTER CONTACTING BEING PERFORMED IN THE PRESENCE OF AN INORGANIC BASE; AND SEPARATING LIQUID PETROLEUM FROM THE SECOND TREATING AGENT IN LIQUID PHASE.
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) | 1961-08-04 | 1962-02-03 | 1962-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-04 | 1966-02-03 | 1966-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-04 | 1970-02-03 | 1970-08-05 | $7700.00 | Window Closed / Lapsed |