US2655462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of phenol from extracts
Assignee: MW Kellogg Co
•
Filing: 1949-09-30
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Granted: 1953-10-13
•
Expires: 1969-09-30
Abstract
No abstract record available.
Inventors
- 👤 Morfit Oliver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:36
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/30; C10G21/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
IN THE SOLVENT TREATMENT OF LUBRICATING OILS TO INCREASE THEIR VISCOSITY INDEX, WHICH INVOLVES CONTACTING OIL WITH PHENOL TO OBTAIN A RAFFINATE PHASE OF IMPROVED VISCOSITY INDEX, AND AN EXTRACT PHASE COMPRISED EXCLUSIVELY OF EXTRACT OIL, PHENOL, AND WATER, AND WHEREIN SUBSTANTIALLY ALL OF THE PHENOL AND WATER ARE SEPARATED FROM SAID EXTRACT PHASE BY HEATING TO PRODUCE AN EXTRACT OIL CONTAINING ONLY A MINOR PERCENTAGE OF PHENOL, AN IMPROVED METHOD FOR RECOVERING RESIDUAL PHENOL, WHICH METHOD INCLUDES: COUNTERCURRENTLY CONTACTING SAID EXTRACT OIL WITH A HOT STRIPPING GAS
Claim 2
Dependent Claim
88 words
IN THE SOLVENT TREATMENT OF LUBRICATING OILS TO INCREASE THEIR VISCOSITY INDEX, WHICH INVOLVES CONTACTING OIL WITH PHENOL TO OBTAIN A RAFFINATE PHASE OF IMPROVED VISCOSITY INDEX, AND AN EXTRACT PHASE COMPRISED EXCLUSIVELY OF EXTRACT OIL, PHENOL, AND WATER, AND WHEREIN SUBSTANTIALLY ALL OF THE PHENOL AND WATER ARE SEPARATED FROM SAID EXTRACT PHASE BY HEATING TO PRODUCE AN EXTRACT OIL CONTAINING ONLY A MINOR PERCENTAGE OF PHENOL, AN IMPROVED METHOD FOR RECOVERING RESIDUAL PHENOL, WHICH METHOD INCLUDES: COUNTERCURRENTLY CONTACTING SAID EXTRACT OIL WITH A HOT STRIPPING GAS
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-12 | 1957-04-13 | 1957-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-12 | 1961-04-13 | 1961-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-12 | 1965-04-13 | 1965-10-13 | $7700.00 | Window Closed / Lapsed |