US2673175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic lubricating oil
Assignee: —
•
Filing: —
•
Granted: 1954-03-23
•
Expires: 1971-03-23
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:36
CPC Classifications
C; C10; C10G; C10G27/00; C10G27/04; C10G2400/00; C10G2400/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A LUBRICATING OIL COMPOSITION PREPARED BY CONTACTING A SOLVENT EXTRACTED, HYDROGENATED MINERAL LUBRICATING OIL FRACTION WITH A GAS COMPRISING FREE OXYGEN AT A TEMPERATURE OF 200-400* F. UNTIL A PRODUCT HAVING A SAPONIFICATION NUMBER OF AT LEAST 20 AND NOT MORE THAN ABOUT 70 IS PRODUCED, AND TREATING THE OXIDIZED PRODUCT WITH A NEUTRALIZING AGENT UNTIL THE NEUTRALIZATION
Claim 2
Dependent Claim
58 words
A LUBRICATING OIL COMPOSITION PREPARED BY CONTACTING A SOLVENT EXTRACTED, HYDROGENATED MINERAL LUBRICATING OIL FRACTION WITH A GAS COMPRISING FREE OXYGEN AT A TEMPERATURE OF 200-400* F. UNTIL A PRODUCT HAVING A SAPONIFICATION NUMBER OF AT LEAST 20 AND NOT MORE THAN ABOUT 70 IS PRODUCED, AND TREATING THE OXIDIZED PRODUCT WITH A NEUTRALIZING AGENT UNTIL THE NEUTRALIZATION
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) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |