US2658854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gravity dewaxing of wax-bearing hydrocarbon fractions
Assignee: ExxonMobil Oil Corp
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Filing: 1951-10-01
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Granted: 1953-11-10
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Expires: 1971-10-01
Abstract
No abstract record available.
Inventors
- 👤 Harold C Myers
- 👤 Arnold O Pukkila
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:14
CPC Classifications
C; C10; C10G; C10G73/00; C10G73/02; C10G73/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A PROCESS FOR SEPARATING WAX AND OIL FROM A WAX-OIL MIXTURE, WHICH COMPRISES ADDING A POLYHYDROXY ALCOHOL SELECTED FROM THE GROUP CONSISTING OF DIOLS AND TRIOLS OF LOWER ALIPHATIC HYDROCARBONS, WHICH IS CAPABLE OF REMAINING IN SUBSTANTIALLY THE LIQUID STATE AT THE DEWAXING TEMPERTURE, IS SUBSTANTIALLY SOLUBLE IN OIL AND WAX, POSSESSES HIGH SOLVENT POWER FOR THE SURFACE ACTIVE AGENT SET FORTH HEREINAFTER, AND IS CHEMICALLY STABLE AND INERT UNDER THE CONDITIONS OF OPERATION, TO SAID WAX-OIL MIXTURE, IN AN AMOUNT VARYING BETWEEN ABOUT ONE PER CENT AND ABOUT 200 PER CENT BASED ON THE WEIGHT OF THE WAX-OIL MIXTURE, TO PRODUCE A POLYHYDROXY ALCOHOL-WAXOIL MIXTURE; AGITATING SAID POLYHYDROXY ALCOHOLWAX-OIL MIXTURE IN THE PRESENCE OF A SURFACE ACTIVE AGENT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL ALKYL AROMATIC HYDROCARBON SUL-
Claim 2
Dependent Claim
131 words
A PROCESS FOR SEPARATING WAX AND OIL FROM A WAX-OIL MIXTURE, WHICH COMPRISES ADDING A POLYHYDROXY ALCOHOL SELECTED FROM THE GROUP CONSISTING OF DIOLS AND TRIOLS OF LOWER ALIPHATIC HYDROCARBONS, WHICH IS CAPABLE OF REMAINING IN SUBSTANTIALLY THE LIQUID STATE AT THE DEWAXING TEMPERTURE, IS SUBSTANTIALLY SOLUBLE IN OIL AND WAX, POSSESSES HIGH SOLVENT POWER FOR THE SURFACE ACTIVE AGENT SET FORTH HEREINAFTER, AND IS CHEMICALLY STABLE AND INERT UNDER THE CONDITIONS OF OPERATION, TO SAID WAX-OIL MIXTURE, IN AN AMOUNT VARYING BETWEEN ABOUT ONE PER CENT AND ABOUT 200 PER CENT BASED ON THE WEIGHT OF THE WAX-OIL MIXTURE, TO PRODUCE A POLYHYDROXY ALCOHOL-WAXOIL MIXTURE; AGITATING SAID POLYHYDROXY ALCOHOLWAX-OIL MIXTURE IN THE PRESENCE OF A SURFACE ACTIVE AGENT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL ALKYL AROMATIC HYDROCARBON SUL-
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) | 1956-11-09 | 1957-05-11 | 1957-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-09 | 1961-05-11 | 1961-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-09 | 1965-05-11 | 1965-11-10 | $7700.00 | Window Closed / Lapsed |