Patent US2525076A successfully refreshed from Google Patents.
US2525076A
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Pour depressants
Assignee: Standard Oil Development Co
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Filing: 1948-11-09
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Granted: 1950-10-10
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Expires: 1968-11-09
Abstract
No abstract record available.
Inventors
- 👤 Louis A Mikeska
- 👤 Samuel B Lippincott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:17
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2209/00; C10M2209/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
AN IMPROVED NON-VOLATILE WAXY HYDROCARBON LUBRICATING OIL COMPOSITION CONSISTING ESSENTIALLY OF A WAXY MINERAL OIL BASE STOCK AND FROM 0.1 TO 5.0% OF A PRODUCT OBTAINED BY HEATING A MIXTURE OF AT LEAST TWO DIFFERENT ALIPHATIC CARBOXYLIC ACID HALIDES HAVING FROM 10 TO 30 CARBON ATOMS PER MOLECULE AT A TEMPERATURE OF 400* TO 800*F. FOR A PERIOD OF 1 TO 20 HOURS.
Claim 2
Dependent Claim
63 words
AN IMPROVED NON-VOLATILE WAXY HYDROCARBON LUBRICATING OIL COMPOSITION CONSISTING ESSENTIALLY OF A WAXY MINERAL OIL BASE STOCK AND FROM 0.1 TO 5.0% OF A PRODUCT OBTAINED BY HEATING A MIXTURE OF AT LEAST TWO DIFFERENT ALIPHATIC CARBOXYLIC ACID HALIDES HAVING FROM 10 TO 30 CARBON ATOMS PER MOLECULE AT A TEMPERATURE OF 400* TO 800*F. FOR A PERIOD OF 1 TO 20 HOURS.
References Cited (Backward Citations)
US2033546A
Cited
US2268410A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-09 | 1954-04-10 | 1954-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-09 | 1958-04-10 | 1958-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-09 | 1962-04-10 | 1962-10-10 | $7700.00 | Window Closed / Lapsed |