Patent US5032805A successfully refreshed from Google Patents.
Patent US3041283A successfully refreshed from Google Patents.
US3041283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating compositions
Assignee: Shell USA Inc
•
Filing: 1958-05-19
•
Granted: 1962-06-26
•
Expires: 1978-05-19
Abstract
No abstract record available.
Inventors
- 👤 George M Calhoun
- 👤 William A Hewett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:34
CPC Classifications
C; C10; C10M; C10M151/00; C08; C08F; C08F236/00; C08F236/02; C08F236/04; C08F36/00; C08F36/02; C08F36/04; C08F8/00; C08F8/34; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/24; C10L1/2462; C10L1/2468; C10M131/00; C10M3/00; C08F2800/00; C08F2800/10; C10M2201/00; C10M2201/02; C10M2203/00; C10M2203/06; C10M2203/10; C10M2205/00; C10M2207/00; C10M2207/02; C10M2207/021; 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; C10N; C10N2020/00; C10N2020/01; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/08; C10N2040/12; C10N2040/13; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A LUBRICATING OIL COMPOSITION COMPRISING A MAJOR AMOUNT OF MINERAL LUBRICATING OIL AND FROM ABOUT 0.5% TO ABOUT 20%, OF AN OIL-SOLUBLE HIGH MOLECULAR WEIGHT POLYMER CONTAINING -C8-C20 ALKYL GROUPS AND -S-(CH2)NX GROUPS ATTACHED TO DIFFERENT CARBON ATOMS OF A LINEAR HYDROCARBON CHAIN WHEREIN N IS AN 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 C1-10 ALKYL RADICALS SAID POLYMER HAVING A SULFUR CONTENT OF FROM 1% TO 30%, AND A MOLECULAR WEIGHT FROM 2,000 TO 800,000.
Claim 2
Dependent Claim
101 words
A LUBRICATING OIL COMPOSITION COMPRISING A MAJOR AMOUNT OF MINERAL LUBRICATING OIL AND FROM ABOUT 0.5% TO ABOUT 20%, OF AN OIL-SOLUBLE HIGH MOLECULAR WEIGHT POLYMER CONTAINING -C8-C20 ALKYL GROUPS AND -S-(CH2)NX GROUPS ATTACHED TO DIFFERENT CARBON ATOMS OF A LINEAR HYDROCARBON CHAIN WHEREIN N IS AN 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 C1-10 ALKYL RADICALS SAID POLYMER HAVING A SULFUR CONTENT OF FROM 1% TO 30%, AND A MOLECULAR WEIGHT FROM 2,000 TO 800,000.
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) | 1965-06-25 | 1965-12-25 | 1966-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-25 | 1969-12-25 | 1970-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-25 | 1973-12-25 | 1974-06-26 | $7700.00 | Window Closed / Lapsed |