Patent US2937985A successfully refreshed from Google Patents.
US2937985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal separation of wax and oil
Assignee: Sunoco Inc
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Filing: 1957-05-31
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Granted: 1960-05-24
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Expires: 1977-05-31
Abstract
No abstract record available.
Inventors
- 👤 Fear James Van Dyck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:20
CPC Classifications
B; B04; B04B; B04B5/00; B04B5/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
PROCESS FOR SEPARATING WAX FROM OIL BY MEANS OF A ROTATING CENTRIFUGAL WHEEL WHICH COMPRISES ADMIXING AN UNDILUTED HYDROCARBON CHARGE CONSISTING OF OIL AND WAX WITH HEREINAFTER SPECIFIED EFFUENT FROM THE WHEEL, CONTINUOUSLY INTRODUCING THE MIXTURE AT A DEWAXING TEMPERATURE INTO THE INTERIOR OF THE WHEEL AT A LOCUS INTERMEDIATE ITS HUB AND PERIPHERY, CONTINUOUSLY INTRODUCING A CHILLED DEWAXING SOLVENT HAVING LOW SOLUBILITY FOR WAX AND A DENSITY LESS THAN THAT OF THE WAX INTO THE INTERIOR OF THE WHEEL AT A LOCUS BETWEEN THE FIRST-MENTIONED LOCUS AND THE PERIPHERY, SAID SOLVENT BEING THE SOLE AMOUNT OF SOLVENT EMPLOYED IN THE PROCESS, WITHDRAWING WAX FROM THE WHEEL AT A LOCUS ADJACENT ITS PERIPHERY VIA A CONDUIT CONNECTING THE PERIPHERY WITH AN OUTLET ADJACENT TO THE HUB, WITHDRAWING FROM THE WHEEL ADJACENT ITS HUB EFFLUENT COMPRISING OIL AND SOLVENT, AND RETURNING A MAJOR PORTION OF SAID EFFLUENT COMPRISING OIL AND SOLVENT FOR ADMIXTURE WITH THE CHARGE.
Claim 2
Dependent Claim
155 words
PROCESS FOR SEPARATING WAX FROM OIL BY MEANS OF A ROTATING CENTRIFUGAL WHEEL WHICH COMPRISES ADMIXING AN UNDILUTED HYDROCARBON CHARGE CONSISTING OF OIL AND WAX WITH HEREINAFTER SPECIFIED EFFUENT FROM THE WHEEL, CONTINUOUSLY INTRODUCING THE MIXTURE AT A DEWAXING TEMPERATURE INTO THE INTERIOR OF THE WHEEL AT A LOCUS INTERMEDIATE ITS HUB AND PERIPHERY, CONTINUOUSLY INTRODUCING A CHILLED DEWAXING SOLVENT HAVING LOW SOLUBILITY FOR WAX AND A DENSITY LESS THAN THAT OF THE WAX INTO THE INTERIOR OF THE WHEEL AT A LOCUS BETWEEN THE FIRST-MENTIONED LOCUS AND THE PERIPHERY, SAID SOLVENT BEING THE SOLE AMOUNT OF SOLVENT EMPLOYED IN THE PROCESS, WITHDRAWING WAX FROM THE WHEEL AT A LOCUS ADJACENT ITS PERIPHERY VIA A CONDUIT CONNECTING THE PERIPHERY WITH AN OUTLET ADJACENT TO THE HUB, WITHDRAWING FROM THE WHEEL ADJACENT ITS HUB EFFLUENT COMPRISING OIL AND SOLVENT, AND RETURNING A MAJOR PORTION OF SAID EFFLUENT COMPRISING OIL AND SOLVENT FOR ADMIXTURE WITH THE CHARGE.
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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) | 1963-05-24 | 1963-11-23 | 1964-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-24 | 1967-11-23 | 1968-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-24 | 1971-11-23 | 1972-05-24 | $7700.00 | Window Closed / Lapsed |