US2989463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricants containing basic metal additives
Assignee: Lubrizol Corp
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Filing: 1958-09-30
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Granted: 1961-06-20
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Expires: 1978-09-30
Abstract
No abstract record available.
Inventors
- 👤 Thomas W Mastin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:13
CPC Classifications
C; C10; C10M; C10M159/00; C10M159/12; C10M159/20; C10M159/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
AN IMPROVED LUBRICATING COMPOSITION COMPRISING A MAJOR PROPORTION OF A MINERAL LUBRICATING OIL AND IN COMBINATION THEREWITH FROM ABOUT 0.25 TO ABOUT 5.0 PERCENT BY WEIGHT AS SULFATE ASH OF A PRODUCT PREPARED BY A PROCESS WHICH COMPRISES PREPARING A MIXTURE OF (A) AN ALKYLATED PHENOLIC COMPOUND, (B) AN OIL-SOLUBLE, METAL-FREE, NON-TAUTOMERIC POLAR COMPOUND HAVING AT LEAST 12 ALIPHATIC CARBON ATOMS SELECTED FROM THE CLASS CONSISTING OF ESTERS, ALCOHOLS AND AMINES, PRESENT IN AN AMOUNT GREATER THAN THAT OF (A) AND UP TO ABOUT FIFTEEN TIMES AS MUCH AS (A), ON A WEIGHT BASIS, AND (C) AT LEAST TWO EQUIVALENTS OF A BASIC BARIUM COMPOUND PER EQUIVALENT OF (A), AND HEATING SAID MIXTURE TO DRIVE OFF SUBSTANTIALLY ALL FREE WATER WHICH MAY BE PRESENT AND THEN TREATING SAID WATERFREE MIXTURE WITH CARBON DIOXIDE UNTIL THE TITRATABLE BASICITY OF THE MIXTURE HAS BEEN REDUCED TO A BASE NUMBER LESS THAN 10.
Claim 2
Dependent Claim
150 words
AN IMPROVED LUBRICATING COMPOSITION COMPRISING A MAJOR PROPORTION OF A MINERAL LUBRICATING OIL AND IN COMBINATION THEREWITH FROM ABOUT 0.25 TO ABOUT 5.0 PERCENT BY WEIGHT AS SULFATE ASH OF A PRODUCT PREPARED BY A PROCESS WHICH COMPRISES PREPARING A MIXTURE OF (A) AN ALKYLATED PHENOLIC COMPOUND, (B) AN OIL-SOLUBLE, METAL-FREE, NON-TAUTOMERIC POLAR COMPOUND HAVING AT LEAST 12 ALIPHATIC CARBON ATOMS SELECTED FROM THE CLASS CONSISTING OF ESTERS, ALCOHOLS AND AMINES, PRESENT IN AN AMOUNT GREATER THAN THAT OF (A) AND UP TO ABOUT FIFTEEN TIMES AS MUCH AS (A), ON A WEIGHT BASIS, AND (C) AT LEAST TWO EQUIVALENTS OF A BASIC BARIUM COMPOUND PER EQUIVALENT OF (A), AND HEATING SAID MIXTURE TO DRIVE OFF SUBSTANTIALLY ALL FREE WATER WHICH MAY BE PRESENT AND THEN TREATING SAID WATERFREE MIXTURE WITH CARBON DIOXIDE UNTIL THE TITRATABLE BASICITY OF THE MIXTURE HAS BEEN REDUCED TO A BASE NUMBER LESS THAN 10.
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) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |