Patent US2522455A successfully refreshed from Google Patents.
US2522455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mineral oil containing a copolymer of an aliphatic monoolefin and dihydronaphthalene
Assignee: Standard Oil Development Co
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Filing: 1948-06-24
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Granted: 1950-09-12
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Expires: 1968-06-24
Abstract
No abstract record available.
Inventors
- 👤 Lieber Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:46
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2205/00; C10N; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A LUBRICANT COMPRISING A MAJOR PROPORTION OF A MINERAL LUBRICATING OIL STOCK CONTAINING DISSOLVED THEREIN ABOUT 0.1 TO 10% BY WEIGHT OF A COPOLYMER PREPARED FROM 80 TO 99 PARTS BY WEIGHT OF AN ALIPHATIC MONOOLEFIN CONTAINING FROM 3 TO 5 CARBON ATOMS AND 20 TO 1 PARTS BY WEIGHT OF DIHYDRONAPHTHALENE, SAID COPOLYMER BEING COPOLYMERIZED AT A TEMPERTURE BELOW 0*C. IN THE PRESENCE OF A FRIEDEL-CRAFTS CATALYST AND HAVING A MOLEULAR WEIGHT WITHIN THE RANGE OF 2,000 TO 30,000.
Claim 2
Dependent Claim
80 words
A LUBRICANT COMPRISING A MAJOR PROPORTION OF A MINERAL LUBRICATING OIL STOCK CONTAINING DISSOLVED THEREIN ABOUT 0.1 TO 10% BY WEIGHT OF A COPOLYMER PREPARED FROM 80 TO 99 PARTS BY WEIGHT OF AN ALIPHATIC MONOOLEFIN CONTAINING FROM 3 TO 5 CARBON ATOMS AND 20 TO 1 PARTS BY WEIGHT OF DIHYDRONAPHTHALENE, SAID COPOLYMER BEING COPOLYMERIZED AT A TEMPERTURE BELOW 0*C. IN THE PRESENCE OF A FRIEDEL-CRAFTS CATALYST AND HAVING A MOLEULAR WEIGHT WITHIN THE RANGE OF 2,000 TO 30,000.
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) | 1953-09-11 | 1954-03-13 | 1954-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-11 | 1958-03-13 | 1958-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-11 | 1962-03-13 | 1962-09-12 | $7700.00 | Window Closed / Lapsed |