US2568965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coal acid esters as synthetic lubricants
Assignee: Gulf Research and Development Co
•
Filing: 1947-05-26
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Granted: 1951-09-25
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Expires: 1967-05-26
Abstract
No abstract record available.
Inventors
- 👤 Charles W Montgomery
- 👤 William I Gilbert
- 👤 Robert E Kline
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:24
CPC Classifications
C; C10; C10M; C10M3/00; C10M2207/00; C10M2207/28; C10M2207/284; C10M2207/285; C10N; C10N2040/00; C10N2040/02; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
130 words
A PROCESS OF REDUCING THE COEFFCIENT OF FRICTION BETWEEN METAL SURFACES MOVING IN CONTACT WITH AND RELATIVE TO EACH OTHER WHICH COMPRISES LUBRICATING SAID SURFACES BY A FILM OF A SUBSTANTIALLY NEUTRAL ESTER OF A MONOHYDRIC ALCOHOL AND THE MIXTURE OF AROMATIC ACIDS OBTAINED BY THE OXIDATION WITH GASEOUS OXYGEN AT A TEMPERATURE FROM ABOUT 200* TO ABOUT 300* C. POUNDS PER SURE FROM ABOUT 500 TO ABOUT 1200 POUNDS SQUARE INCH OF AN AQUEOUS ALKALINE SLURRY OF A FINELY DIVIDED CARBONACEOUS MATERIAL SELECTED FROM THE GROUP CONSISTING OF COAL AND COKE OBTAINED BY THE CARBONIZATION OF COAL AT TEMPERATURES BELOW 700* C., THE ACIDIFICATION OF THE RESULTING ALKALINE SOLUTION TO LIBERATE SAID ACIDS AND THE EXTRACTION OF SAID ACIDS WITH AN ORGANIC WATER-IMMISCIBLE SOLVENT WHICH WILL REMOVE THE ACIDS.
Claim 2
Dependent Claim
130 words
A PROCESS OF REDUCING THE COEFFCIENT OF FRICTION BETWEEN METAL SURFACES MOVING IN CONTACT WITH AND RELATIVE TO EACH OTHER WHICH COMPRISES LUBRICATING SAID SURFACES BY A FILM OF A SUBSTANTIALLY NEUTRAL ESTER OF A MONOHYDRIC ALCOHOL AND THE MIXTURE OF AROMATIC ACIDS OBTAINED BY THE OXIDATION WITH GASEOUS OXYGEN AT A TEMPERATURE FROM ABOUT 200* TO ABOUT 300* C. POUNDS PER SURE FROM ABOUT 500 TO ABOUT 1200 POUNDS SQUARE INCH OF AN AQUEOUS ALKALINE SLURRY OF A FINELY DIVIDED CARBONACEOUS MATERIAL SELECTED FROM THE GROUP CONSISTING OF COAL AND COKE OBTAINED BY THE CARBONIZATION OF COAL AT TEMPERATURES BELOW 700* C., THE ACIDIFICATION OF THE RESULTING ALKALINE SOLUTION TO LIBERATE SAID ACIDS AND THE EXTRACTION OF SAID ACIDS WITH AN ORGANIC WATER-IMMISCIBLE SOLVENT WHICH WILL REMOVE THE ACIDS.
Claim 3
Dependent Claim
126 words
A LUBRICANT COMPOSITION COMPRISING A MAJOR AMOUNT OF A MINERAL LUBRICATING OIL AND A MINOR AMOUNT, AT LEAST SUFFICIENT TO RETARD RUSTING, OF A SUBSTANTIALLY NEUTRAL ESTER OF A MONOHYDRIC ALCOHOL AND THE MIXTURE OF AROMATIC ACIDS OBTAINED BY THE OXIDATION WITH GASEOUS OXYGEN AT A TEMPERATURE FROM ABOUT 500 TO ABOUT 300* C. AND AT A PRESSURE FROM ABOUT 500 TO ABOUT 1200 POUNDS PER SQUARE INCH OF AN AQUEOUS ALKALINE SLURRY OF A FINELY DIVIDED CARBONACEOUS MATERIAL SELECTED FROM THE GROUP CONSISTING OF COAL AND COKE OBTAINED BY THE CARBONIZATION OF COAL AT TEMPERATURE BELOW 700* C., THE ACIDIFICATION OF THE RESULTING ALKALINE SOLUTION TO LIBERATE SAID ACIDS AND THE EXTRACTION OF SAID ACIDS WITH AN ORGANIC WATER-IMMISCIBLE SOLVENT WHICH WILL REMOVE THE ACIDS.
Claim 4
Dependent Claim
126 words
A LUBRICANT COMPOSITION COMPRISING A MAJOR AMOUNT OF A MINERAL LUBRICATING OIL AND A MINOR AMOUNT, AT LEAST SUFFICIENT TO RETARD RUSTING, OF A SUBSTANTIALLY NEUTRAL ESTER OF A MONOHYDRIC ALCOHOL AND THE MIXTURE OF AROMATIC ACIDS OBTAINED BY THE OXIDATION WITH GASEOUS OXYGEN AT A TEMPERATURE FROM ABOUT 500 TO ABOUT 300* C. AND AT A PRESSURE FROM ABOUT 500 TO ABOUT 1200 POUNDS PER SQUARE INCH OF AN AQUEOUS ALKALINE SLURRY OF A FINELY DIVIDED CARBONACEOUS MATERIAL SELECTED FROM THE GROUP CONSISTING OF COAL AND COKE OBTAINED BY THE CARBONIZATION OF COAL AT TEMPERATURE BELOW 700* C., THE ACIDIFICATION OF THE RESULTING ALKALINE SOLUTION TO LIBERATE SAID ACIDS AND THE EXTRACTION OF SAID ACIDS WITH AN ORGANIC WATER-IMMISCIBLE SOLVENT WHICH WILL REMOVE THE ACIDS.
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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) | 1954-09-24 | 1955-03-26 | 1955-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-24 | 1959-03-26 | 1959-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-24 | 1963-03-26 | 1963-09-25 | $7700.00 | Window Closed / Lapsed |