US2984616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extraction of lube oil with phenol up to haze point change
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1958-10-27
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Granted: 1961-05-16
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Expires: 1978-10-27
Abstract
No abstract record available.
Inventors
- 👤 Robert F Burke
- 👤 Burton J Sutker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:38
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C10G21/12; C10G21/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
AN IMPROVED PROCESS FOR THE MANUFACTURE OF LUBE PRODUCTS FROM A HYDROCARBON STREAM DERIVED FROM A NAPHTHENIC CRUDE WHICH COMPRISES EXTRACTING SAID HYDROCARBON STREAM WITH PHENOL TO INCREASE THE VISCOSITY INDEX OF SAID HYDROCARBON STREAM, RECOVERING FROM SAID PHENOL EXTRACTION STEP A RAFFINATE HAVING ABOUT THE SAME HAZE POINT AS SAID HYDROCARBON STREAM AND ISOMERIZING SAID RAFFINATE IN THE PRESENCE OF HYDROGEN TO INCREASE THE VISCOSITY INDEX OF SAID RAFFINATE WHILE PRESERVING THE HAZE POINT OF SAID RAFFINATE AT SUBSTANTIALLY THE SAME VALUE.
Claim 2
Dependent Claim
83 words
AN IMPROVED PROCESS FOR THE MANUFACTURE OF LUBE PRODUCTS FROM A HYDROCARBON STREAM DERIVED FROM A NAPHTHENIC CRUDE WHICH COMPRISES EXTRACTING SAID HYDROCARBON STREAM WITH PHENOL TO INCREASE THE VISCOSITY INDEX OF SAID HYDROCARBON STREAM, RECOVERING FROM SAID PHENOL EXTRACTION STEP A RAFFINATE HAVING ABOUT THE SAME HAZE POINT AS SAID HYDROCARBON STREAM AND ISOMERIZING SAID RAFFINATE IN THE PRESENCE OF HYDROGEN TO INCREASE THE VISCOSITY INDEX OF SAID RAFFINATE WHILE PRESERVING THE HAZE POINT OF SAID RAFFINATE AT SUBSTANTIALLY THE SAME VALUE.
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) | 1964-05-15 | 1964-11-14 | 1965-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-15 | 1968-11-14 | 1969-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-15 | 1972-11-14 | 1973-05-16 | $7700.00 | Window Closed / Lapsed |