US2520748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric oxide lubricant containing organic disulfide
Assignee: Shell Development Co
•
Filing: 1946-10-28
•
Granted: 1950-08-29
•
Expires: 1966-10-28
Abstract
No abstract record available.
Inventors
- 👤 William E Vaughan
- 👤 Harman Denham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:16
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2207/00; C10M2207/02; C10M2207/023; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/105; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/062; C10M2215/066; C10M2217/00; C10M2217/04; C10M2217/044; C10M2217/045; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/084; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2040/00; C10N2040/20; C10N2040/22; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A LUBRICATING COMPOSITION COMPRISING A MAJOR AMOUNT OF AN OLEAGINOUS ALKYLENE POLYMERIC OXIDE MATERIAL AND A MINOR AMOUNT SUFFICIET TO IMPART EXTREME PRESSURE PROPERTIES OF AN ORGANIC DISULFIDE HAVING THE GENERAL CONFIGURATION: XO-R-S-S-R-OX, WHEREIN EACH R IS A SATURATED ALKYLENE RADICAL AND EACH X IS A SUBSTITUENT OF THE GROUP CONSISTING OF HYDROGEN ATOMS, SATURATED ALKYL RADICALS AND SATURATED ACYCLIC ACYL GROUPS HAVING UP TO EIGHTEEN CARBON ATOMS, SAID DISULFIDE BEING PREPARED BY DISPERSING A MERCAPTO ALKYL MONOHYDRIC ALCOHOL IN AN ALKALINE MEDIUM, OXIDIZING SAID ALCOHOL WITH A PEROXIDE, REMOVING FROM THE PRODUCT THE PORTION VOLATILIZING BELOW ABOUT 140*C. AT 0.2 CM. MERCURY PRESSURE TO OBTAIN THE ORGANIC DISULFIDE RESIDUE.
Claim 2
Dependent Claim
110 words
A LUBRICATING COMPOSITION COMPRISING A MAJOR AMOUNT OF AN OLEAGINOUS ALKYLENE POLYMERIC OXIDE MATERIAL AND A MINOR AMOUNT SUFFICIET TO IMPART EXTREME PRESSURE PROPERTIES OF AN ORGANIC DISULFIDE HAVING THE GENERAL CONFIGURATION: XO-R-S-S-R-OX, WHEREIN EACH R IS A SATURATED ALKYLENE RADICAL AND EACH X IS A SUBSTITUENT OF THE GROUP CONSISTING OF HYDROGEN ATOMS, SATURATED ALKYL RADICALS AND SATURATED ACYCLIC ACYL GROUPS HAVING UP TO EIGHTEEN CARBON ATOMS, SAID DISULFIDE BEING PREPARED BY DISPERSING A MERCAPTO ALKYL MONOHYDRIC ALCOHOL IN AN ALKALINE MEDIUM, OXIDIZING SAID ALCOHOL WITH A PEROXIDE, REMOVING FROM THE PRODUCT THE PORTION VOLATILIZING BELOW ABOUT 140*C. AT 0.2 CM. MERCURY PRESSURE TO OBTAIN THE ORGANIC DISULFIDE RESIDUE.
References Cited (Backward Citations)
US2001715A
Cited
US2174248A
Cited
US2246712A
Cited
US2378576A
Cited
US2293868A
Cited
US2415002A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |