Patent FR849384A successfully refreshed from Google Patents.
Patent US2506570A successfully refreshed from Google Patents.
US2506570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil compositions
Assignee: ExxonMobil Oil Corp
•
Filing: 1945-10-05
•
Granted: 1950-05-09
•
Expires: 1965-10-05
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry J Andress
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:47
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2223/00; C10M2223/12; C10M2223/121; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2010/06; C10N2010/08; C10N2010/10; C10N2010/12; C10N2010/14; C10N2010/16; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
AN IMPROVED MINERAL OIL COMPOSITION COMPRISING A MINERAL OIL FRACTION HAVING IN ADMIXTURE THERWITH A MINOR PROPORTION, SUFFICIENT TO INHIBIT SAID OIL FRACTION AGAINST OXIDATION, OF AN ACIDIC, PHOSPHORUS- AND SULFUR-CONTAINING REACTION PRODUCT OF A WAX-SUBSTITUTED PHENOL OBTAINED BY: REACTING ONE MOLAR PROPORTION OF PHOSPHORUS PENTASULFIDE WITH A WAX-SUBSTITUTED PHENOL CONTAINING ABOUT TWO MOLAR PROPORTIONS OF PHENOL AT A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 100*C. TO ABOUT 200*C. IN THE PRESENCE OF A FRIEDEL-CRAFTS CATALYST AND TREATING THE REACTION MIXTURE THUS FORMED WITH A SMALL AMOUNT FROM ABOUT 1 PER CENT TO ABOUT 2 PER CENT, OF ZINC DUST BASED ON THE AMOUNT OF WAXSUBSTITUTED PHENOL USED IN THE REACTION AND A SMALL AMOUNT OF WATER.
Claim 2
Dependent Claim
118 words
AN IMPROVED MINERAL OIL COMPOSITION COMPRISING A MINERAL OIL FRACTION HAVING IN ADMIXTURE THERWITH A MINOR PROPORTION, SUFFICIENT TO INHIBIT SAID OIL FRACTION AGAINST OXIDATION, OF AN ACIDIC, PHOSPHORUS- AND SULFUR-CONTAINING REACTION PRODUCT OF A WAX-SUBSTITUTED PHENOL OBTAINED BY: REACTING ONE MOLAR PROPORTION OF PHOSPHORUS PENTASULFIDE WITH A WAX-SUBSTITUTED PHENOL CONTAINING ABOUT TWO MOLAR PROPORTIONS OF PHENOL AT A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 100*C. TO ABOUT 200*C. IN THE PRESENCE OF A FRIEDEL-CRAFTS CATALYST AND TREATING THE REACTION MIXTURE THUS FORMED WITH A SMALL AMOUNT FROM ABOUT 1 PER CENT TO ABOUT 2 PER CENT, OF ZINC DUST BASED ON THE AMOUNT OF WAXSUBSTITUTED PHENOL USED IN THE REACTION AND A SMALL AMOUNT OF WATER.
References Cited (Backward Citations)
US2063629A
Cited
US2383495A
Cited
US2364284A
Cited
US2365938A
Cited
US2342431A
Cited
US2358305A
Cited
US2386207A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-08 | 1953-11-07 | 1954-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-08 | 1957-11-07 | 1958-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-08 | 1961-11-07 | 1962-05-09 | $7700.00 | Window Closed / Lapsed |