US2761814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of paraffin wax products
Assignee: Shell Development Co
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Filing: 1954-12-20
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Granted: 1956-09-04
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Expires: 1974-12-20
Abstract
No abstract record available.
Inventors
- 👤 Benjamin G Post
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:21
CPC Classifications
C; C10; C10G; C10G73/00; C10G73/02; C10G73/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
THE PROCESS OF SEGREGATING A SUBSTANTIALLY OIL FREE PARAFFIN WAX HAVING IMPROVED LOW TEMPERATURE FLEXIBILITY WHICH COMPRISES DISTILLING A SOLVENT EXTRACTED WAXY LUBRICATING OIL INTO A PLURALITY OF HIGH VISCOSITY INDEX LUBRICATING FRACTIONS WAXY LUBRICATING OIL FRACTIONS, DEWAXING ONE OF SAID FRACTIONS TO PRODUCE A SUBSTANTIALLY WAX-FREE LUBRICATING OIL AND A FIRST SLACK WAX WHICH ON DEOILING WOULD YIELD A FIRST LOWER MELTING POINT WAX, SEPARATELY DEWAXING A SECOND OF SAID WAXY HIGH VISCOSITY INDEX FRACTIONS TO PRODUCE A SUBSTANTIALLY WAX-FREE LUBRICATING OIL AND A SECOND SLACK WAX WHICH ON DEOILING WOULD YIELD A SECOND HIGHER MELTING POINT WAX WITH AN AVERAGE MOLECULAR WEIGHT FROM ABOUT 50 TO ABOUT 150 UNITS HIGHER THAN THAT OF SAID FIRST WAX, AND SOLVENT DEOILING THE SLACK WAXES AT A TEMPERATURE BELOW ABOUT 32* F. AND ABOVE 10* F. TO PRODUCE A PARAFFIN WAX PRODUCT HAVING AN AVERAGE MELTING POINT IN THE RANGE OF 120140* F. AND IMPROVED LOW TEMPERATURE FLEXIBILITY PROPERTIES, THE PRODUCT CONTAINING 30-50% OF WAX FROM THE FIRST SLACK WAX AND 50-70% OF WAX FROM THE SECOND TO THE SEPARATE DEWAXING STEPS.
Claim 2
Dependent Claim
181 words
THE PROCESS OF SEGREGATING A SUBSTANTIALLY OIL FREE PARAFFIN WAX HAVING IMPROVED LOW TEMPERATURE FLEXIBILITY WHICH COMPRISES DISTILLING A SOLVENT EXTRACTED WAXY LUBRICATING OIL INTO A PLURALITY OF HIGH VISCOSITY INDEX LUBRICATING FRACTIONS WAXY LUBRICATING OIL FRACTIONS, DEWAXING ONE OF SAID FRACTIONS TO PRODUCE A SUBSTANTIALLY WAX-FREE LUBRICATING OIL AND A FIRST SLACK WAX WHICH ON DEOILING WOULD YIELD A FIRST LOWER MELTING POINT WAX, SEPARATELY DEWAXING A SECOND OF SAID WAXY HIGH VISCOSITY INDEX FRACTIONS TO PRODUCE A SUBSTANTIALLY WAX-FREE LUBRICATING OIL AND A SECOND SLACK WAX WHICH ON DEOILING WOULD YIELD A SECOND HIGHER MELTING POINT WAX WITH AN AVERAGE MOLECULAR WEIGHT FROM ABOUT 50 TO ABOUT 150 UNITS HIGHER THAN THAT OF SAID FIRST WAX, AND SOLVENT DEOILING THE SLACK WAXES AT A TEMPERATURE BELOW ABOUT 32* F. AND ABOVE 10* F. TO PRODUCE A PARAFFIN WAX PRODUCT HAVING AN AVERAGE MELTING POINT IN THE RANGE OF 120140* F. AND IMPROVED LOW TEMPERATURE FLEXIBILITY PROPERTIES, THE PRODUCT CONTAINING 30-50% OF WAX FROM THE FIRST SLACK WAX AND 50-70% OF WAX FROM THE SECOND TO THE SEPARATE DEWAXING STEPS.
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) | 1959-09-04 | 1960-03-05 | 1960-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-04 | 1964-03-05 | 1964-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-04 | 1968-03-05 | 1968-09-04 | $7700.00 | Window Closed / Lapsed |