Patent US2534095A successfully refreshed from Google Patents.
US2534095A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocarbon copolymers and use thereof as lube oil additive
Assignee: Standard Oil Development Co
•
Filing: 1948-03-31
•
Granted: 1950-12-12
•
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
2026-11-08 07:46
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.
References Cited (Backward Citations)
US2410381A
Cited
US2142980A
Cited
GB513169A
Cited
US2274031A
Cited
US2327705A
Cited
US2387784A
Cited
US2387543A
Cited
US2408798A
Cited
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 |