Patent US2768129A successfully refreshed from Google Patents.
US2768129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation resistant mineral oils and method of preparing same
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1953-07-01
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Granted: 1956-10-23
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Expires: 1973-07-01
Abstract
No abstract record available.
Inventors
- 👤 Jr William T Knox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:59
CPC Classifications
C; C10; C10G; C10G25/00; C10G71/00; C10M; C10M105/00; C10M105/02; C10M105/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
65 words
AN IMPROVED LUBRICATING OIL COMPOSITION COMPRISING A MINERAL LUBRICATING OIL CONTAINING AN OXIDATION INHIBITING AMOUNT OF A RELATIVELY NARROW FRACTION OF A SILICA GEL AROMATIC EXTRACT OBTAINED FROM A PARAFFINIC-BASE MINERAL OIL BASE STOCK, SAID FRACTION BEING SELECTED FROM THE LAST 30% OF THE AROMATICS MOST STRONGLY ADSORBED BY THE SILICA GEL AND HAVING A SPREAD OF LESS THAN 10% OF THE TOTAL AROMATIC EXTRACT.
Claim 2
Dependent Claim
65 words
AN IMPROVED LUBRICATING OIL COMPOSITION COMPRISING A MINERAL LUBRICATING OIL CONTAINING AN OXIDATION INHIBITING AMOUNT OF A RELATIVELY NARROW FRACTION OF A SILICA GEL AROMATIC EXTRACT OBTAINED FROM A PARAFFINIC-BASE MINERAL OIL BASE STOCK, SAID FRACTION BEING SELECTED FROM THE LAST 30% OF THE AROMATICS MOST STRONGLY ADSORBED BY THE SILICA GEL AND HAVING A SPREAD OF LESS THAN 10% OF THE TOTAL AROMATIC EXTRACT.
Claim 3
Independent Claim
101 words
A METHOD FOR PREPARING A LUBRICATING OIL COMPOSITION HAVING IMPROVED RESISTANCE TO OXIDATION WHICH COMPRISES ADSORBING A PARAFINIC-BASE MINERAL OIL BASE STOCK ON SILICA GEL, SELECTIVELY DESORBING THE RELATIVELY MORE AROMATIC CONSTITUENTS OF SAID BASE STOCK FROM SAID SILICA GEL TO OBTAIN A RELATIVELY NARROW FRACTION FROM THE LAST 30% OF THE AROMATICS MOST STRONGLY ADSORBED BY THE SILICA GEL, SAID RELATIVELY NARROW FRACTION HAVING A SPREAD OF LESS THAN 10% OF THE TOTAL AROMATIC EXTRACT, AND THEN INCORPORATING INTO A MINERAL LUBRICATING OIL ABOUT 0.1 TO 5% BY WEIGHT OF SAID RELATIVELY NARROW FRACTION, BASED ON SAID MINERAL LUBRICATING OIL.
Claim 4
Independent Claim
101 words
A METHOD FOR PREPARING A LUBRICATING OIL COMPOSITION HAVING IMPROVED RESISTANCE TO OXIDATION WHICH COMPRISES ADSORBING A PARAFINIC-BASE MINERAL OIL BASE STOCK ON SILICA GEL, SELECTIVELY DESORBING THE RELATIVELY MORE AROMATIC CONSTITUENTS OF SAID BASE STOCK FROM SAID SILICA GEL TO OBTAIN A RELATIVELY NARROW FRACTION FROM THE LAST 30% OF THE AROMATICS MOST STRONGLY ADSORBED BY THE SILICA GEL, SAID RELATIVELY NARROW FRACTION HAVING A SPREAD OF LESS THAN 10% OF THE TOTAL AROMATIC EXTRACT, AND THEN INCORPORATING INTO A MINERAL LUBRICATING OIL ABOUT 0.1 TO 5% BY WEIGHT OF SAID RELATIVELY NARROW FRACTION, BASED ON SAID MINERAL LUBRICATING OIL.
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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) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |