US2848384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refining lubricating oils
Assignee: Sunoco Inc
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Filing: 1955-06-20
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Granted: 1958-08-19
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Expires: 1975-06-20
Abstract
No abstract record available.
Inventors
- 👤 Fear James Van Dyck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:16
CPC Classifications
C; C10; C10G; C10G53/00; C10G53/02; C10G53/08; C10G2400/00; C10G2400/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
IN AN ADSORPTION PROCESS FOR THE REMOVAL OF LOW V.I. AROMATIC CONSTITUENTS FROM MINERAL OILS OF LUBRICATING VISCOSITY CONTAINING A MINOR PROPORTION OF VERY STRONGLY ADSORBABLE COMPOUNDS, THE IMPROVEMENT WHICH COMPRISES CONTACTING A FIRST ADSORBENT MASS WITH A MINERAL OIL FEED STOCK OF LUBRICATING VISCOSITY COMPRISING AN AROMATIC FRACTION OF HIGH VISCOSITY AT ROOM TEMPERATURE, A SATURATE FRACTION OF LOWER VISCOSITY AT ROOM TEMPERATURE AND A MINOR PROPORTION OF GEL POSIONS, WHICH HAS BEEN HEATED TO A TEMPERATURE OF BETWEEN ABOUT 150*F. TO ABOUT 250*F. AND SUFFICIENT TO REDUCE THE VISCOSITY OF THE AROMATIC FRACTION TO AM POINT SUCH THAT IT PRESENTS NO SUBSTANTIAL RESISTANCE TO THE ENTRY OF THE GEL POISIONS INTO THE PORES OF THE ADSORBENT, WITHDRAWING A MINERAL OIL SUBSTANTIALLY FREE OF GEL POISONS, PASSING SAID MINERAL OIL, AT A LOWER TEMPERATURE NOT IN EXCESS OF ABOUT 200*F.,
Claim 2
Dependent Claim
141 words
IN AN ADSORPTION PROCESS FOR THE REMOVAL OF LOW V.I. AROMATIC CONSTITUENTS FROM MINERAL OILS OF LUBRICATING VISCOSITY CONTAINING A MINOR PROPORTION OF VERY STRONGLY ADSORBABLE COMPOUNDS, THE IMPROVEMENT WHICH COMPRISES CONTACTING A FIRST ADSORBENT MASS WITH A MINERAL OIL FEED STOCK OF LUBRICATING VISCOSITY COMPRISING AN AROMATIC FRACTION OF HIGH VISCOSITY AT ROOM TEMPERATURE, A SATURATE FRACTION OF LOWER VISCOSITY AT ROOM TEMPERATURE AND A MINOR PROPORTION OF GEL POSIONS, WHICH HAS BEEN HEATED TO A TEMPERATURE OF BETWEEN ABOUT 150*F. TO ABOUT 250*F. AND SUFFICIENT TO REDUCE THE VISCOSITY OF THE AROMATIC FRACTION TO AM POINT SUCH THAT IT PRESENTS NO SUBSTANTIAL RESISTANCE TO THE ENTRY OF THE GEL POISIONS INTO THE PORES OF THE ADSORBENT, WITHDRAWING A MINERAL OIL SUBSTANTIALLY FREE OF GEL POISONS, PASSING SAID MINERAL OIL, AT A LOWER TEMPERATURE NOT IN EXCESS OF ABOUT 200*F.,
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) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |