US2534095A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocarbon copolymers and use thereof as lube oil additive
Assignee: Standard Oil Development Co
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Filing: 1948-03-31
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Granted: 1950-12-12
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Expires: 1968-03-31
Abstract
No abstract record available.
Inventors
- 👤 David W Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:45
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2205/00; C10N; C10N2040/00; C10N2040/08; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
PRODUCT CONSISTING ESSENTIALLY OF COPOLYMER OF ABOUT 75% TO 99% BY VOLUM OF ISOBUTYLENE AND ABOUT 1% TO 25% BY VOLUME OF A HIGHER NORMAL ALPHA OLEFIN OF 6 TO 20 CARBON ATOMS, SAID COPOLYMER BEING A SEMI-SOLID TACKY SUBSTANCE HAVING AN AVERAGE MOLECULAR WEIGHT OF ABOUT 2,000 TO 30,000 AND HAVING AN IODINE NUMBER BELOW 1.
Claim 2
Dependent Claim
57 words
PRODUCT CONSISTING ESSENTIALLY OF COPOLYMER OF ABOUT 75% TO 99% BY VOLUM OF ISOBUTYLENE AND ABOUT 1% TO 25% BY VOLUME OF A HIGHER NORMAL ALPHA OLEFIN OF 6 TO 20 CARBON ATOMS, SAID COPOLYMER BEING A SEMI-SOLID TACKY SUBSTANCE HAVING AN AVERAGE MOLECULAR WEIGHT OF ABOUT 2,000 TO 30,000 AND HAVING AN IODINE NUMBER BELOW 1.
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Cited
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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) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |