US3052657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfur-containing polymers and lubricants containing them
Assignee: Shell USA Inc
•
Filing: 1960-02-10
•
Granted: 1962-09-04
•
Expires: 1980-02-10
Abstract
No abstract record available.
Inventors
- 👤 George M Calhoun
- 👤 William A Hewett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:19
CPC Classifications
C; C10; C10M; C10M151/00; C08; C08F; C08F210/00; C08F8/00; C08F8/34; C08F2800/00; C08F2800/10; C10M2203/00; C10M2203/06; C10M2203/10; C10M2205/00; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/34; C10M2207/40; C10M2207/402; C10M2207/404; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/10; C10M2209/103; C10M2209/107; C10M2221/00; C10M2221/04; C10M2221/041; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
AN OIL-SOLUTION HIGH MOLECULAR WEIGHT POLYMER CONTAINING A PLURALITY OF C8-C20 ALKYL GROUPS AND -S-(CH2)NX GROUPS ATTACHED TO DIFFERENT CARBON ATOMS OF A LINEAR HYDROCARBON CHAIN WHEREIN N IS INTEGER OF 1 TO 4 AND X IS A POLAR GROUP SELECTED FROM THE GROUP CONSISTING OF -COOR, -OR AND -NR2, AND R IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND C1-C10 ALKYL RADICALS SAID POLYER HAVING A SULFUR CONTENT OF FROM 1% TO 30% AND A MOLECULAR WEIGHT OF FROM 2000 TO 800,000 OBTAINED BY REACTING AN OMEGA-POLARSUBSTITUTED MERCAPTAN IN THE PRESENCE OF A CATALYST WITH A COPOLYMER OF A C4-C8 DIOLEFIN AND A POLYMERIZABLE OILSOLUBLE MONOMER CONTAINING A C8-C20 ALKYL RADICAL SELECTED FROM THE GROUP CONSISTING OF A-INSATURATED MONOOLEFIN HYDROCARBONS, OF C8-20 ALKYL ACRYLATES, VINYL ESTERS OF C8-20 FATTY ACIDS, VINYL ETHERS OF C8-20 ALKANOLS AND C8-20 ALKYL ACRYLAMIDES.
Claim 2
Dependent Claim
141 words
AN OIL-SOLUTION HIGH MOLECULAR WEIGHT POLYMER CONTAINING A PLURALITY OF C8-C20 ALKYL GROUPS AND -S-(CH2)NX GROUPS ATTACHED TO DIFFERENT CARBON ATOMS OF A LINEAR HYDROCARBON CHAIN WHEREIN N IS INTEGER OF 1 TO 4 AND X IS A POLAR GROUP SELECTED FROM THE GROUP CONSISTING OF -COOR, -OR AND -NR2, AND R IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND C1-C10 ALKYL RADICALS SAID POLYER HAVING A SULFUR CONTENT OF FROM 1% TO 30% AND A MOLECULAR WEIGHT OF FROM 2000 TO 800,000 OBTAINED BY REACTING AN OMEGA-POLARSUBSTITUTED MERCAPTAN IN THE PRESENCE OF A CATALYST WITH A COPOLYMER OF A C4-C8 DIOLEFIN AND A POLYMERIZABLE OILSOLUBLE MONOMER CONTAINING A C8-C20 ALKYL RADICAL SELECTED FROM THE GROUP CONSISTING OF A-INSATURATED MONOOLEFIN HYDROCARBONS, OF C8-20 ALKYL ACRYLATES, VINYL ESTERS OF C8-20 FATTY ACIDS, VINYL ETHERS OF C8-20 ALKANOLS AND C8-20 ALKYL ACRYLAMIDES.
References Cited (Backward Citations)
US2581092A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-03 | 1966-03-05 | 1966-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-03 | 1970-03-05 | 1970-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-03 | 1974-03-05 | 1974-09-04 | $7700.00 | Window Closed / Lapsed |