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US2742401A
Expired / Lapsed
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Methyl-ethyl ketone dewaxing process
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1952-07-23
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Granted: 1956-04-17
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Expires: 1972-07-23
Abstract
No abstract record available.
Inventors
- 👤 J D Kinchen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:42
CPC Classifications
C; C10; C10G; C10G73/00; C10G73/02; C10G73/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A PROCESS FOR INCREASING THE METHYL KETONE CONCENTRATION FROM ABOUT 60% TO ABOUT 80% OF TOTAL SOLVENT IN A DEWAXING OPERATION EMPLOYING A MIXTURE OF METHYL-ETHYL KETONE AND TOLUENE AS A DEWAXING SOLVENT DURING CHILLING AND WAX SEPARATION IN WHICH AT LEAST ONE FLASH ZONE AND ONE STEAM STRIPPING ZONE ARE EMPOLYED TO RECOVER SOLVENT FROM THE DEWAXING OPERATION, SAID SOLVENT FROM THE FLASHING ZONE BEING CONTINUOUSLY RECYCLED
Claim 2
Dependent Claim
68 words
A PROCESS FOR INCREASING THE METHYL KETONE CONCENTRATION FROM ABOUT 60% TO ABOUT 80% OF TOTAL SOLVENT IN A DEWAXING OPERATION EMPLOYING A MIXTURE OF METHYL-ETHYL KETONE AND TOLUENE AS A DEWAXING SOLVENT DURING CHILLING AND WAX SEPARATION IN WHICH AT LEAST ONE FLASH ZONE AND ONE STEAM STRIPPING ZONE ARE EMPOLYED TO RECOVER SOLVENT FROM THE DEWAXING OPERATION, SAID SOLVENT FROM THE FLASHING ZONE BEING CONTINUOUSLY RECYCLED
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) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |