US3810952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid copolymers of 1,3-butadiene and 1-monoolefins,their preparation and uses
Assignee: IFP Energies nouvelles
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Filing: 1972-09-19
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Granted: 1974-05-14
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Expires: 1992-09-19
Abstract
Abstract LIQUID COPOLYMERS OF 1,3-BUTADIENE WITH ONE OR MORE 1-MONOOLEFIN(S) ARE DISCLOSED. THEY ARE CONSTITUTED OF OLEFINIC AND BUTADIENE UNITS, AMONG WHICH AT LEAST 80% CIS-1,4 BUTADIENE UNITS. THEIR INTRINISC VISCOSITY OF 30*C. IN TOLUENE IS FROM 0.02 TO 1.0 DL/G. TUEIO PREPARATION INVOLVES THE USE AS CATALYST OF A NICKEL FLUOROCARBOXYLATE HALIDE, PARTICULARLY NICKEL TRIFLUOROACETATE CHLORIDE. THEY ARE USEFUL FOR MAY INDUSTRIAL APPLICARIONS.
Inventors
- 👤 J Durand
- 👤 F Dawans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:50
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
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References Cited (Backward Citations)
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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) | 1977-05-13 | 1977-11-12 | 1978-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-13 | 1981-11-12 | 1982-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-13 | 1985-11-12 | 1986-05-14 | $7700.00 | Window Closed / Lapsed |