US2624707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating composition
Assignee: Shell Development Co
•
Filing: 1949-06-07
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Granted: 1953-01-06
•
Expires: 1969-06-07
Abstract
No abstract record available.
Inventors
- 👤 George G Pritzker
- 👤 David E Adelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:53
CPC Classifications
C; C10; C10M; C10M137/00; C10M137/16; C10M2205/00; C10M2205/02; C10M2205/026; C10M2205/16; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/026; C10M2207/027; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/123; C10M2207/125; C10M2207/129; C10M2207/14; C10M2207/141; C10M2207/142; C10M2207/144; C10M2207/146; C10M2207/20; C10M2207/22; C10M2207/28; C10M2207/282; C10M2207/284; C10M2207/285; C10M2207/34; C10M2207/40; C10M2207/402; C10M2207/404; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/082; C10M2209/10; C10M2209/101; C10M2209/103; C10M2211/00; C10M2211/02; C10M2211/022; C10M2211/024; C10M2211/04; C10M2211/044; C10M2211/06; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/06; C10M2215/062; C10M2215/064; C10M2215/065; C10M2215/066; C10M2215/16; C10M2215/20; C10M2215/202; C10M2215/204; C10M2219/00; C10M2219/02; C10M2219/024; C10M2219/04; C10M2219/042; C10M2219/044; C10M2219/06; C10M2219/062; C10M2219/066; C10M2219/068; C10M2219/08; C10M2219/082; C10M2219/083; C10M2219/085; C10M2219/086; C10M2219/087; C10M2219/089; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/043; C10M2223/045; C10M2223/047; C10M2223/06; C10M2223/063; C10M2223/065; C10M2223/08; C10M2223/10; C10M2223/12; C10M2223/121; C10M2227/00; C10M2227/06; C10M2227/08; C10M2229/00; C10M2229/04; C10M2229/041; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2010/06; C10N2010/08; C10N2010/10; C10N2010/12; C10N2010/14; C10N2010/16; C10N2040/00; C10N2040/08; C10N2040/135; C10N2050/00; C10N2050/10; C10N2060/00; C10N2060/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
AN OLEAGINOUS BASE HAVING INCORPORATED THEREIN AN AMOUNT SUFFICIENT TO STABILIZE AGAINST DETERIORATION AND IMPART EXTREME PRESSURE PROPERTIES TO SAID BASE, A METAL-FREE REACTION PRODUCT OBTAINED BY REACTING AT REFLUX TEMPERATURE A PHOSPHORUS SULFIDE WITH A HETEROCYCLIC RING COMPOUND SELECTED FROM THE GROUP CONSISTING OF THIOPHENE, BENZOTHIAZOLE, AND ALPHA, ALPHA-DIPYRIDYL COMPOUNDS IN THE MOLE RATIO OF 1:5 TO 2:1, RESPECTIVELY.
Claim 2
Dependent Claim
60 words
AN OLEAGINOUS BASE HAVING INCORPORATED THEREIN AN AMOUNT SUFFICIENT TO STABILIZE AGAINST DETERIORATION AND IMPART EXTREME PRESSURE PROPERTIES TO SAID BASE, A METAL-FREE REACTION PRODUCT OBTAINED BY REACTING AT REFLUX TEMPERATURE A PHOSPHORUS SULFIDE WITH A HETEROCYCLIC RING COMPOUND SELECTED FROM THE GROUP CONSISTING OF THIOPHENE, BENZOTHIAZOLE, AND ALPHA, ALPHA-DIPYRIDYL COMPOUNDS IN THE MOLE RATIO OF 1:5 TO 2:1, RESPECTIVELY.
References Cited (Backward Citations)
US2140545A
Cited
US2146584A
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US2160293A
Cited
US2516119A
Cited
US2479513A
Cited
US2571333A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-06 | 1956-07-07 | 1957-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-06 | 1960-07-07 | 1961-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-06 | 1964-07-07 | 1965-01-06 | $7700.00 | Window Closed / Lapsed |