US2614080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil additive materials
Assignee: Standard Oil Development Co
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Filing: 1950-07-22
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Granted: 1952-10-14
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Expires: 1970-07-22
Abstract
No abstract record available.
Inventors
- 👤 Welch Lester Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:19
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C08; C08F; C08F297/00; C08F297/06; C08F8/00; C08F8/02; C10M2205/00; C10M2205/04; C10N; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
130 words
A LUBRICATING COMPOSITION CONSISTING ESSENTAILLY OF A MAJOR PROPORTION OF A WAXY LUBRICATING OIL BASE HAVING COMBINED THEREIN 0.01% TO 10.0% BY WEIGHT, BASED ON THE WEIGHT OF THE TOTAL COMPOSITION, OF AN ALKYLATED POLYSTYRENE WHICH HAS BEEN PREPARED BY FIRST REACTING POLYSTYRENE HAVING A MOLECULAR WEIGHT WITHIN A RANGE OF FROM 10,000 TO 70,000 WITH AN APPROXIMATELY EQUIMOLAR PROPORTION OF A LINEAR ALIPHATIC MONOOLEFIN HAVING FROM 12 TO 22 CARBON ATOMS IN THE PRESENCE OF A FRIEDEL-CRAFTS CATALYST AND REACTING THE PRODUCT THUS FORMED WITH APPROXIMATELY 2 MOLAR PROPORTIONS, BASED ON THE POLYSTYRENE OF A LINEAR ALIPHATIC MONOOLEFIN HAVING FROM 2 TO 10 CARBON ATOMS IN THE PRESENCE OF A FRIEDEL-CRAFTS CATALYST TO OBTAIN A FINAL PRODUCT HAVING A MOLECULAR WEIGHT WITHIN A RANGE OF FROM 7,000 TO 20,000.
References Cited (Backward Citations)
US2072120A
Cited
US2282456A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-14 | 1956-04-14 | 1956-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-14 | 1960-04-14 | 1960-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-14 | 1964-04-14 | 1964-10-14 | $7700.00 | Window Closed / Lapsed |