US3789036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing saturated and unsaturated elastomeric copolymers of ethylene and/or higher alpha-olefins
Assignee: Montedison SpA
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Filing: 1971-10-12
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Granted: 1974-01-29
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Expires: 1991-10-12
Abstract
Abstract THERE IS DISCLOSED A PROCESS FOR COPOLYMERIZING ETHYLENE AND/OR HIGHER ALPHA-OLEFINS TO ELASTOMERIC SATURATED COPOLYMERS, OR FOR COPOLYMERIZING AT LEAST ONE OF ETHYLENE AND HIGHER ALPHA-OLEFINS WITH HYDROCARBONS CONTAINING MORE THAN ONE DOUBLE BOND TO ELASTOMERIC UNSATURATED, SULFUR-VULCANIZABLE COPOLYMERS IN VERY HIGH YIELDS. THE CATALYST USED IS OBTAINED BY MIXING (A) A HYDRICE OR ORGANOMETALLIC COMPOUND OF A METAL BELONGING TO GROUPS I TO III OF THE MENDELYEEV PERIODIC TABLE WITH (B) THE PRODUCT OBTAINED BY CONTACTING A TITANIUM COMPOUND WITH A SUPPORT CONSISTING OF AN ANHYDROUS HALIDE OF MAGNESIUM, MANGANESE OR CALCIUM IN AN ACTIVE CONDITION.
Inventors
- 👤 P Longi
- 👤 N Cameli
- 👤 R Cervi
- 👤 A Valvassori
- 👤 S Parodi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:17
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/16; C08F4/00; C08F4/02; C08F4/022; Y; Y10; Y10S; Y10S526/00; Y10S526/906
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |