US2628941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extreme pressure lubricant
Assignee: Shell Development Co
•
Filing: 1950-02-04
•
Granted: 1953-02-17
•
Expires: 1970-02-04
Abstract
No abstract record available.
Inventors
- 👤 David E Adelson
- 👤 George L Perry
- 👤 George G Pritzker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:28
CPC Classifications
C; C10; C10M; C10M159/00; C10M159/12; C10M2201/00; C10M2201/02; C10M2201/06; C10M2201/062; C10M2201/10; C10M2201/105; C10M2203/00; C10M2203/02; C10M2203/022; C10M2203/024; C10M2203/04; C10M2203/06; C10M2203/10; C10M2205/00; C10M2205/02; C10M2205/026; C10M2205/14; C10M2205/16; C10M2205/17; C10M2205/20; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/022; C10M2207/023; C10M2207/026; C10M2207/027; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/122; C10M2207/123; C10M2207/124; C10M2207/125; C10M2207/128; C10M2207/129; C10M2207/14; C10M2207/141; C10M2207/142; C10M2207/144; C10M2207/146; C10M2207/16; C10M2207/18; C10M2207/20; C10M2207/22; C10M2207/24; C10M2207/28; C10M2207/282; C10M2207/284; C10M2207/285; C10M2207/287; C10M2207/289; C10M2207/34; C10M2207/40; C10M2207/402; C10M2207/404; C10M2209/00; C10M2209/02; C10M2209/04; C10M2209/06; C10M2209/062; C10M2209/08; C10M2209/082; C10M2209/10; C10M2209/101; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/106; C10M2209/107; C10M2209/108; C10M2209/109; C10M2209/12; C10M2211/00; C10M2211/02; C10M2211/022; C10M2211/024; C10M2211/04; C10M2211/044; C10M2211/06; C10M2211/08; C10M2213/00; C10M2213/04; C10M2213/06; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/06; C10M2215/062; C10M2215/064; C10M2215/065; C10M2215/066; C10M2215/067; C10M2215/10; C10M2215/102; C10M2215/16; C10M2215/18; C10M2215/20; C10M2215/202; C10M2215/204; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/26; C10M2215/30; C10M2217/00; C10M2217/02; C10M2217/04; C10M2217/042; C10M2217/043; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/086; C10M2219/087; C10M2219/088; C10M2219/089; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2010/06; C10N2010/08; C10N2010/10; C10N2010/12; C10N2010/14; C10N2010/16; C10N2030/00; C10N2030/08; C10N2030/12; C10N2040/00; C10N2040/04; C10N2040/042; C10N2040/044; C10N2040/046; C10N2040/20; C10N2040/22; C10N2040/24; C10N2040/241; C10N2040/242; C10N2040/243; C10N2040/244; C10N2040/245; C10N2040/246; C10N2040/247; C10N2050/00; C10N2050/10; C10N2060/00; C10N2060/04; C10N2070/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A LUBRICATING COMPOSITION COMPRISING A MAJOR AMOUNT OF A LIQUID ORGANIC LUBRICATING BASE HAVING INCORPORATED THEREIN FROM ABOUT 0.01 TO 10% OF A REACTION PRODUCT OBTAINED BY REACTING AN ALIPHATIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF C2-C5 ALKYLENE OXIDE, C2-C5 ALKYLENE SULFIDE, AND C2-C5 ALKYLENE IMINE WITH AN ORGANIC POLY ACIDIC COMPOUND CONTAINING FROM 1 TO 3 FREE CARBOXYLIC ACID GROUPS AND AT LEAST ONE HYDROXY GROUP, SAID REACTION BEING CARRIED OUT AT A TEMPERATURE OF AT LEAST 75* C. IN THE MOLE RATIO OF FROM 4:1 TO 12:1 RESPECTIVELY.
Claim 2
Dependent Claim
91 words
A LUBRICATING COMPOSITION COMPRISING A MAJOR AMOUNT OF A LIQUID ORGANIC LUBRICATING BASE HAVING INCORPORATED THEREIN FROM ABOUT 0.01 TO 10% OF A REACTION PRODUCT OBTAINED BY REACTING AN ALIPHATIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF C2-C5 ALKYLENE OXIDE, C2-C5 ALKYLENE SULFIDE, AND C2-C5 ALKYLENE IMINE WITH AN ORGANIC POLY ACIDIC COMPOUND CONTAINING FROM 1 TO 3 FREE CARBOXYLIC ACID GROUPS AND AT LEAST ONE HYDROXY GROUP, SAID REACTION BEING CARRIED OUT AT A TEMPERATURE OF AT LEAST 75* C. IN THE MOLE RATIO OF FROM 4:1 TO 12:1 RESPECTIVELY.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-17 | 1956-08-18 | 1957-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-17 | 1960-08-18 | 1961-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-17 | 1964-08-18 | 1965-02-17 | $7700.00 | Window Closed / Lapsed |