US3151083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oils
Assignee: —
•
Filing: —
•
Granted: 1964-09-29
•
Expires: 1981-09-29
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:04
CPC Classifications
C; C10; C10G; C10G71/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A PROCESS FOR IMPROVING THE SPREADING PRESSURE OF A MINERAL LUBRICATING OIL CONTAINING AT LEAST 2% AROMATIC AND HETEROCYCLIC MATERIALS AND AT LEAST 0.45% SULFUR, WHICH COMPRISES TREATING THE OIL AT AMBIENT TEMPERATURE FOR FROM 5 MINUTES TO 4 HOURS WITH FROM 0.05% TO 10% EACH OF AN INORGANIC ACID SELECTED FROM THE GROUP CONSISTING OF SULFURIC ACID AND HYDROCHLORIC ACID AND AN AQUEOUS SOLUTION OF 5% TO 95% HYDROGEN PEROXIDE WITHOUT ESSENTIALLY AFFECTING THE SULFUR CONTENT OF THE OIL.
Claim 2
Dependent Claim
80 words
A PROCESS FOR IMPROVING THE SPREADING PRESSURE OF A MINERAL LUBRICATING OIL CONTAINING AT LEAST 2% AROMATIC AND HETEROCYCLIC MATERIALS AND AT LEAST 0.45% SULFUR, WHICH COMPRISES TREATING THE OIL AT AMBIENT TEMPERATURE FOR FROM 5 MINUTES TO 4 HOURS WITH FROM 0.05% TO 10% EACH OF AN INORGANIC ACID SELECTED FROM THE GROUP CONSISTING OF SULFURIC ACID AND HYDROCHLORIC ACID AND AN AQUEOUS SOLUTION OF 5% TO 95% HYDROGEN PEROXIDE WITHOUT ESSENTIALLY AFFECTING THE SULFUR CONTENT OF THE OIL.
References Cited (Backward Citations)
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Cited
US1863004A
Cited
US2472503A
Cited
US2767122A
Cited
GB776438A
Cited
US2882121A
Cited
US2852355A
Cited
US3007872A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-29 | 1968-03-30 | 1968-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-29 | 1972-03-30 | 1972-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-29 | 1976-03-30 | 1976-09-29 | $7700.00 | Window Closed / Lapsed |