US2980603A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Producing oxidation resistant lubricants
Assignee: Sunoco Inc
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Filing: 1958-01-13
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Granted: 1961-04-18
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Expires: 1978-01-13
Abstract
No abstract record available.
Inventors
- 👤 Fear James Van Dyck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:23
CPC Classifications
C; C10; C10G; C10G67/00; C10G2400/00; C10G2400/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
PROCESS FOR PRODUCING OXIDATION RESISTANT LUBRICANTS WHICH COMPRISES SEPARATING PETROLEUM LUBRICATING OIL INTO A SATURATED FRACTION AND AN AROMATIC FRACTION, CONTACTING THE SATURATED FRACTION WITH HYDROGEN IN THE PRESENCE OF A METALLIC HYDROGENATION CATALYST AT A TEMPERATURE OF 650 TO 825*F., CONTACTING THE AROMATIC FRACTION WITH HYDROGEN IN THE PRESENCE OF A METALLIC HYDROGENATION CATALYST AT A TEMPERATURE OF 450 TO 750*F., THE SEVERITY OF THE LATTER CONTACTING BEING LESS THAN THAT OF THE FIRSTNAMED CONTACTING, AND BLENDING THE HYDROGENATED AROMATIC FRACTION WITH THE HYDROGENATED SATURATED FRACTION.
Claim 2
Dependent Claim
87 words
PROCESS FOR PRODUCING OXIDATION RESISTANT LUBRICANTS WHICH COMPRISES SEPARATING PETROLEUM LUBRICATING OIL INTO A SATURATED FRACTION AND AN AROMATIC FRACTION, CONTACTING THE SATURATED FRACTION WITH HYDROGEN IN THE PRESENCE OF A METALLIC HYDROGENATION CATALYST AT A TEMPERATURE OF 650 TO 825*F., CONTACTING THE AROMATIC FRACTION WITH HYDROGEN IN THE PRESENCE OF A METALLIC HYDROGENATION CATALYST AT A TEMPERATURE OF 450 TO 750*F., THE SEVERITY OF THE LATTER CONTACTING BEING LESS THAN THAT OF THE FIRSTNAMED CONTACTING, AND BLENDING THE HYDROGENATED AROMATIC FRACTION WITH THE HYDROGENATED SATURATED FRACTION.
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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) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |