US2998378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dewaxing process with 2-stage sulfur treatment
Assignee: Gulf Research and Development Co
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Filing: 1958-10-09
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Granted: 1961-08-29
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Expires: 1978-10-09
Abstract
No abstract record available.
Inventors
- 👤 Theodore J Weismann
- 👤 William M Zarrella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:58
CPC Classifications
C; C10; C10G; C10G73/00; C10G73/02; C10G73/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
THE PROCESS FOR PREPARING PARAFFIN WAX IN HIGH YIELD WHICH COMPRISES IN COMBINATION ADDING BETWEEN ABOUT 0.01 AND 10 PERCENT SULFUR TO A MEMBER OF THE GROUP CONSISTING OF CRUDE PETROLEUM AND HIGH BOILING FRACTIONS OF CRUDE PETROLEUM, HEATING THE MIXTURE TO A TEMPERATURE BETWEEN ABOUT 150* AND 170*C., SUBJECTING THE REACTION PRODUCT TO TREATMENT FOR REMOVAL OF A FIRST PORTION OF PARAFFIN WAX HIGH IN MICROCRYSTALLINE COMPONENTS, ADDING BETWEEN ABOUT 0.01 AND 10 PERCENT ELEMENTAL SULFUR TO THE CRUDE FROM WHICH THE PARAFFIN WAX FORMED DURING THE PRECEDING TREATMENT HAS BEEN REMOVED, HEATING THE MIXTURE TO A TEMPERATURE OF BETWEEN ABOUT 225* AND 250*C. AND REMOVING A SECOND PORTION OF PARAFFIN WAX, SAID SECOND PORTION CONTAINING A LOWER PERCENTAGE OF MICROCRYSTALLINE COMPONENTS THAN THE FIRST PORTION OF PARAFFIN WAX.
Claim 2
Dependent Claim
130 words
THE PROCESS FOR PREPARING PARAFFIN WAX IN HIGH YIELD WHICH COMPRISES IN COMBINATION ADDING BETWEEN ABOUT 0.01 AND 10 PERCENT SULFUR TO A MEMBER OF THE GROUP CONSISTING OF CRUDE PETROLEUM AND HIGH BOILING FRACTIONS OF CRUDE PETROLEUM, HEATING THE MIXTURE TO A TEMPERATURE BETWEEN ABOUT 150* AND 170*C., SUBJECTING THE REACTION PRODUCT TO TREATMENT FOR REMOVAL OF A FIRST PORTION OF PARAFFIN WAX HIGH IN MICROCRYSTALLINE COMPONENTS, ADDING BETWEEN ABOUT 0.01 AND 10 PERCENT ELEMENTAL SULFUR TO THE CRUDE FROM WHICH THE PARAFFIN WAX FORMED DURING THE PRECEDING TREATMENT HAS BEEN REMOVED, HEATING THE MIXTURE TO A TEMPERATURE OF BETWEEN ABOUT 225* AND 250*C. AND REMOVING A SECOND PORTION OF PARAFFIN WAX, SAID SECOND PORTION CONTAINING A LOWER PERCENTAGE OF MICROCRYSTALLINE COMPONENTS THAN THE FIRST PORTION OF PARAFFIN WAX.
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) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |