US2668790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isomerization of paraffin wax
Assignee: Shell Development Co
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Filing: 1953-01-12
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Granted: 1954-02-09
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Expires: 1973-01-12
Abstract
No abstract record available.
Inventors
- 👤 George M Good
- 👤 John W Gibson
- 👤 Bernard S Greensfelder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:29
CPC Classifications
C; C10; C10G; C10G47/00; C10G47/02; C10G47/10; C10G47/12; C10G47/14; C10G2400/00; C10G2400/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A PROCESS FOR THEPRODUCTION OF A LUBRICATING OIL FORM PARAFFIN WAX WHICH COMPRISES CONTACTING A MOLTEN NORMALLY SOLID PARAFFIN WAX IN THE LIQUID PHASE AND WITH AT LEAST ONE MOLE OF HYDROGEN PER MOLE OF WAX WITH A SUPPORTED PLATINUM CATALYST AT A TEMPERATURE BETWEEN ABOUT 300* C. AND ABOUT 500* C. AND UNDER A PRESSURE BETWEEN ABOUT 50 AND 3000 P.S.I.G. FOR A CONTACT TIME OF AT LEAST 5 MINUTES BUT SUFFICIENT TO PRODUCE MORE THAN 25% CONVERSION TO CRACKED PRODUCTS OF LOWER MOLECULAR WEIGHT, COOLING THE PRODUCTS, SEPARATING AND RECYCLING THE HYDROGEN-CONTAINING GAS. DISTILLING THE PRODUCT TO REMOVE A LUBRICATING OIL DISTILLATE,, ADN SUBJECTING THE SAID DISTILLATE TO A DEWAXNG TREATMENT TO SEPARATE UNCONVERTED WAX FROM THE LIQUID OIL.
Claim 2
Dependent Claim
121 words
A PROCESS FOR THEPRODUCTION OF A LUBRICATING OIL FORM PARAFFIN WAX WHICH COMPRISES CONTACTING A MOLTEN NORMALLY SOLID PARAFFIN WAX IN THE LIQUID PHASE AND WITH AT LEAST ONE MOLE OF HYDROGEN PER MOLE OF WAX WITH A SUPPORTED PLATINUM CATALYST AT A TEMPERATURE BETWEEN ABOUT 300* C. AND ABOUT 500* C. AND UNDER A PRESSURE BETWEEN ABOUT 50 AND 3000 P.S.I.G. FOR A CONTACT TIME OF AT LEAST 5 MINUTES BUT SUFFICIENT TO PRODUCE MORE THAN 25% CONVERSION TO CRACKED PRODUCTS OF LOWER MOLECULAR WEIGHT, COOLING THE PRODUCTS, SEPARATING AND RECYCLING THE HYDROGEN-CONTAINING GAS. DISTILLING THE PRODUCT TO REMOVE A LUBRICATING OIL DISTILLATE,, ADN SUBJECTING THE SAID DISTILLATE TO A DEWAXNG TREATMENT TO SEPARATE UNCONVERTED WAX FROM THE LIQUID OIL.
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) | 1957-02-08 | 1957-08-10 | 1958-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-08 | 1961-08-10 | 1962-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-08 | 1965-08-10 | 1966-02-09 | $7700.00 | Window Closed / Lapsed |