US3157624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymer of a straight chain olefin and a styrene
Assignee: California Research LLC
•
Filing: 1961-06-28
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Granted: 1964-11-17
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Expires: 1981-06-28
Abstract
No abstract record available.
Inventors
- 👤 Vries Louis De
- 👤 Richard E Lyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:59
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
AN OIL SOLUBLE COPOLYMER COMPOUND PREPARED FROM (A) OF AT LEAST ONE STRAIGHT-CHAIN 1-OLEFIN OF FROM 10 TO 20 CARBON ATOMS AND (B) AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF STYRENE AND ALKYL RING WITH ALKYL GROUPS CONTAINING 1 TO 5 CARBON ATOMS, SAID COPOLYMER BEING PREPARED IN THE PRESENCE OF A COCATALYST REACTION PRODUCT OF TRIALKYL ALUMINUM AND TITANIUM TETRACHLORIDE ALUMINUM CHLORIDE COMPLEX OF STOICHIOMETRICAL PROPORTIONS OF ABOUT 3 MOLS OF TITANIUM TRICHLORIDE TO ABOUT 1 MOL OF ALUMINUM CHLORIDE IN AN INERT SOLVENT AT A TEMPERATURE DOWN TO AT LEAST -10*C., SAID COPOLYMER HAVING A 1-OLEFIN TO STYRENE MOL RATIO OF FROM 4 TO 14, SAID COPOLYMER HAVING A MOLECULAR WEIGHT FROM ABOUT 100,000 TO ABOUT 1,000,000 AS DETERMINED BY STANDARD VISCOSITY MEASUREMENTS.
Claim 2
Dependent Claim
127 words
AN OIL SOLUBLE COPOLYMER COMPOUND PREPARED FROM (A) OF AT LEAST ONE STRAIGHT-CHAIN 1-OLEFIN OF FROM 10 TO 20 CARBON ATOMS AND (B) AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF STYRENE AND ALKYL RING WITH ALKYL GROUPS CONTAINING 1 TO 5 CARBON ATOMS, SAID COPOLYMER BEING PREPARED IN THE PRESENCE OF A COCATALYST REACTION PRODUCT OF TRIALKYL ALUMINUM AND TITANIUM TETRACHLORIDE ALUMINUM CHLORIDE COMPLEX OF STOICHIOMETRICAL PROPORTIONS OF ABOUT 3 MOLS OF TITANIUM TRICHLORIDE TO ABOUT 1 MOL OF ALUMINUM CHLORIDE IN AN INERT SOLVENT AT A TEMPERATURE DOWN TO AT LEAST -10*C., SAID COPOLYMER HAVING A 1-OLEFIN TO STYRENE MOL RATIO OF FROM 4 TO 14, SAID COPOLYMER HAVING A MOLECULAR WEIGHT FROM ABOUT 100,000 TO ABOUT 1,000,000 AS DETERMINED BY STANDARD VISCOSITY MEASUREMENTS.
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) | 1967-11-17 | 1968-05-18 | 1968-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-17 | 1972-05-18 | 1972-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-17 | 1976-05-18 | 1976-11-17 | $7700.00 | Window Closed / Lapsed |