US3524732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pour depressant composition
Assignee: Texaco Inc
•
Filing: 1965-12-13
•
Granted: 1970-08-18
•
Expires: 1985-12-13
Abstract
No abstract record available.
Inventors
- 👤 William M Sweeney
- 👤 Anthony L Ippolito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:32
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/16; C10L1/1625; C10L1/1633; C10L1/1641; C08; C08F; C08F8/00; C08F8/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A FUEL OIL COMPRISING A MAJOR PROPORTION OF A MINERAL OIL HAVING A HIGH POUR POINT CONTAINING A MINOR AMOUNT EFFECTIVE TO SUBSTANTIALLY LOWER THE POUR POINT OF A COMPOSITION PREPARED BY REACTIN ETHYLENE AND PROPYLENE IN A MOLE RATIO FROM 10:1 TO 1:10 RESPECTIVELY UNDER VIGOROUS STIRRING IN THE PRESENCE OF A COMBINATION OF POLYMERIZATION CATALYSTS TO PRODUCE A COPOLYMER HAVING A MOLECULAR WEIGHT FROM ABOUT 10,000 TO 1,000,000 AND SUBJECTING SAID COPOLYMER TO CRACKING AT A TEMPERATURE IN THE RANGE OF 200 TO 500*C. TO PRODUCE A CRACKED ETHYLENE-PROPYLENE COPOLYMER HAVING A MOLECULAR WEIGHT IN THE RANGE OF 2,000 TO 6,000.
Claim 2
Dependent Claim
103 words
A FUEL OIL COMPRISING A MAJOR PROPORTION OF A MINERAL OIL HAVING A HIGH POUR POINT CONTAINING A MINOR AMOUNT EFFECTIVE TO SUBSTANTIALLY LOWER THE POUR POINT OF A COMPOSITION PREPARED BY REACTIN ETHYLENE AND PROPYLENE IN A MOLE RATIO FROM 10:1 TO 1:10 RESPECTIVELY UNDER VIGOROUS STIRRING IN THE PRESENCE OF A COMBINATION OF POLYMERIZATION CATALYSTS TO PRODUCE A COPOLYMER HAVING A MOLECULAR WEIGHT FROM ABOUT 10,000 TO 1,000,000 AND SUBJECTING SAID COPOLYMER TO CRACKING AT A TEMPERATURE IN THE RANGE OF 200 TO 500*C. TO PRODUCE A CRACKED ETHYLENE-PROPYLENE COPOLYMER HAVING A MOLECULAR WEIGHT IN THE RANGE OF 2,000 TO 6,000.
References Cited (Backward Citations)
US2379728A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-17 | 1974-02-16 | 1974-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-17 | 1978-02-16 | 1978-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-17 | 1982-02-16 | 1982-08-18 | $7700.00 | Window Closed / Lapsed |