US2963426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color improvement of petroleum lubricating oils
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1957-01-02
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Granted: 1960-12-06
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Expires: 1977-01-02
Abstract
No abstract record available.
Inventors
- 👤 Clinton H Holder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:00
CPC Classifications
C; C10; C10G; C10G67/00; C10G67/02; C10G67/10; C10G2400/00; C10G2400/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A PROCESS FOR UPGRADING AND IMPROVING THE COLOR OF A PETROLEUM LUBRICATING OIL BASE STOCK WHICH COMPRISES THE STEPS OF TREATING THE OIL WITH A SUBSTANTIAL EXCESS OF AN AQUEOUS METAL HYDROXIDE BEYOND THAT REQUIRED FOR NEUTRALIZATION, SAID METAL HYDROXIDE BEING SELECTED FROM THE GROUP CONSISTING OF HYDROXIDES OF ALKALI METALS AND ALKALINE EARTH METALS AT A TEMPERATURE WITHIN THE RANGE OF 300* TO 700*F., SEPARATING THE THUS TREATED OIL FROM THE AQUEOUS METAL HYDROXIDE BY DISTALLATION WHEREBY THE OIL IS RERUN IN DIRECT CONTACT WITH THE ALKALINE TREATING AGENT AND HYDROFINING THE RERUN OIL IN THE PRESENCE OF A HYDROFINING CATALYST TO PRODUCE AN OIL OF IMPROVED COLOR AND IN PARTICULAR IMPROVED HEAT STABILITY.
Claim 2
Dependent Claim
115 words
A PROCESS FOR UPGRADING AND IMPROVING THE COLOR OF A PETROLEUM LUBRICATING OIL BASE STOCK WHICH COMPRISES THE STEPS OF TREATING THE OIL WITH A SUBSTANTIAL EXCESS OF AN AQUEOUS METAL HYDROXIDE BEYOND THAT REQUIRED FOR NEUTRALIZATION, SAID METAL HYDROXIDE BEING SELECTED FROM THE GROUP CONSISTING OF HYDROXIDES OF ALKALI METALS AND ALKALINE EARTH METALS AT A TEMPERATURE WITHIN THE RANGE OF 300* TO 700*F., SEPARATING THE THUS TREATED OIL FROM THE AQUEOUS METAL HYDROXIDE BY DISTALLATION WHEREBY THE OIL IS RERUN IN DIRECT CONTACT WITH THE ALKALINE TREATING AGENT AND HYDROFINING THE RERUN OIL IN THE PRESENCE OF A HYDROFINING CATALYST TO PRODUCE AN OIL OF IMPROVED COLOR AND IN PARTICULAR IMPROVED HEAT STABILITY.
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) | 1963-12-06 | 1964-06-06 | 1964-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-06 | 1968-06-06 | 1968-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-06 | 1972-06-06 | 1972-12-06 | $7700.00 | Window Closed / Lapsed |