US2642379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of wax and asphalt from hydrocarbon oil
Assignee: ExxonMobil Oil Corp
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Filing: 1949-09-13
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Granted: 1953-06-16
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Expires: 1969-09-13
Abstract
No abstract record available.
Inventors
- 👤 Franklin L Dennis
- 👤 William H King
- 👤 Harold C Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:34
CPC Classifications
C; C10; C10G; C10G73/00; C10G73/02; C10G73/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
IN THE REFINING OF A RESIDUAL LUBRICATING OIL STOCK CONTAINING HYDROCARBON WAX WHEREIN SAID STOCK IS CONTACTED IN SOLUTION WITH UREA, WHEREBY SAID HYDROCARBON WAX PREFERENTIALLY FORMS A CRYSTALLINE COMPLEX WITH UREA, AND WHEREIN SAID COMPLEX AND THE REMAINING OIL STOCK ARE SEPARATED, THE IMPROVEMENT WHICH COMPRISES: SO CONTACTING SAID OIL STOCK AND UREA IN SOLUTION IN A MIXTURE OF CRESYLIC ACID, AT A TEMPERATURE OF ABOUT 125* F.
Claim 2
Dependent Claim
69 words
IN THE REFINING OF A RESIDUAL LUBRICATING OIL STOCK CONTAINING HYDROCARBON WAX WHEREIN SAID STOCK IS CONTACTED IN SOLUTION WITH UREA, WHEREBY SAID HYDROCARBON WAX PREFERENTIALLY FORMS A CRYSTALLINE COMPLEX WITH UREA, AND WHEREIN SAID COMPLEX AND THE REMAINING OIL STOCK ARE SEPARATED, THE IMPROVEMENT WHICH COMPRISES: SO CONTACTING SAID OIL STOCK AND UREA IN SOLUTION IN A MIXTURE OF CRESYLIC ACID, AT A TEMPERATURE OF ABOUT 125* F.
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) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |