Patent US2805803A successfully refreshed from Google Patents.
Patent US2529484A successfully refreshed from Google Patents.
US2529484A
Expired / Lapsed
US
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Treatment for the improvement of lubricating oils
Assignee: Phillips Petroleum Co
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Filing: 1947-12-15
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Granted: 1950-11-14
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Expires: 1967-12-15
Abstract
No abstract record available.
Inventors
- 👤 Paul H Carnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:02
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C10G21/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
THE PROCESS OF MANUFACTURING A LUBRICATING OIL OF IMPROVED VISCOSITY INDEX, COLOR, AND STABILITY WHICH COMPRISES CONTACTING A LUBRICATING OIL BY THOROUGH MINGLING WITH A MIXTURE OF AT LEAST ONE SATURATED ALIPHATIC ALCOHOL, HYDROFLUORIC ACID, AND WATER NOT IN EXCESS OF 5 TO 10 WEIGHT PER CENT OF THE HYDROFLUORIC ACID PRESENT, IN THE PROPORTION OF ALCOHOL, OIL, AND HYDROFLUORIC ACID OF ABOUT 1:3:3 FOR ABOUT 5 TO ABOUT 200 MINUTES AT A SUFFICIENT PRESSURE TO MAINTAIN THE HYDROFLUORIC ACID SUBSTANTIALLY LIQUID AND A TEMPERATURE OF ABOUT -20 TO ABOUT 40*F., AND FURTHER TREATING SAID LUBRICATING OIL WITH A MIXTURE OF AT LEAST ONE SATURATED ALIPHATIC ALCOHOL, HYDROFLUORIC ACID, AND WATER NOT IN EXCESS OF 5 TO 10 WEIGHT PER CENT OF THE HYDROFLUORIC ACID PRESENT, IN THE PROPORTION OF ALCOHOL, OIL, AND HYDROFLUORIC AND OF ABOUT 1:1:1 TO ABOUT 1:1:3 FOR ABOUT 5 TO ABOUT 200 MINUTES AT A SUFFICIENT PRESSURE TO MAINTAIN THE HYDROFLUORIC ACID SUBSTANTIALLY LIQUID AND A TEMPERATURE OF ABOUT 100 TO ABOUT 500*F., AND RECOVERING SAID IMPROVED LUBRICATING OIL.
Claim 2
Dependent Claim
174 words
THE PROCESS OF MANUFACTURING A LUBRICATING OIL OF IMPROVED VISCOSITY INDEX, COLOR, AND STABILITY WHICH COMPRISES CONTACTING A LUBRICATING OIL BY THOROUGH MINGLING WITH A MIXTURE OF AT LEAST ONE SATURATED ALIPHATIC ALCOHOL, HYDROFLUORIC ACID, AND WATER NOT IN EXCESS OF 5 TO 10 WEIGHT PER CENT OF THE HYDROFLUORIC ACID PRESENT, IN THE PROPORTION OF ALCOHOL, OIL, AND HYDROFLUORIC ACID OF ABOUT 1:3:3 FOR ABOUT 5 TO ABOUT 200 MINUTES AT A SUFFICIENT PRESSURE TO MAINTAIN THE HYDROFLUORIC ACID SUBSTANTIALLY LIQUID AND A TEMPERATURE OF ABOUT -20 TO ABOUT 40*F., AND FURTHER TREATING SAID LUBRICATING OIL WITH A MIXTURE OF AT LEAST ONE SATURATED ALIPHATIC ALCOHOL, HYDROFLUORIC ACID, AND WATER NOT IN EXCESS OF 5 TO 10 WEIGHT PER CENT OF THE HYDROFLUORIC ACID PRESENT, IN THE PROPORTION OF ALCOHOL, OIL, AND HYDROFLUORIC AND OF ABOUT 1:1:1 TO ABOUT 1:1:3 FOR ABOUT 5 TO ABOUT 200 MINUTES AT A SUFFICIENT PRESSURE TO MAINTAIN THE HYDROFLUORIC ACID SUBSTANTIALLY LIQUID AND A TEMPERATURE OF ABOUT 100 TO ABOUT 500*F., AND RECOVERING SAID IMPROVED LUBRICATING OIL.
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) | 1953-11-13 | 1954-05-15 | 1954-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-13 | 1958-05-15 | 1958-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-13 | 1962-05-15 | 1962-11-14 | $7700.00 | Window Closed / Lapsed |