Patent US3645993A successfully refreshed from Google Patents.
US3645993A
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Interpolymerization of a mixture of monoolefins and a polyene in the presence of a base and a halogenated compound
Assignee: DSM Copolymer Inc
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Filing: 1969-06-16
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Granted: 1972-02-29
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Expires: 1989-06-16
Abstract
Abstract SULFUR VULCANIZABLE ELASTOMERS WHICH ARE SUBSTANTIALLY FREE OF GEL ARE PREPARED IN SOLUTION IN AN ORGANIC SOLVENT FROM A MONOMERIC MIXTURE INCLUDING ETHYLENE, AN ALPHAMONOOLEFIN CONTAINING 3-16 CARBON ATOMS AND A POLYUNSATURATED MONOMER IN THE PRESENCE OF A ZIEGLER-TYPE POLYMERIZATION CATALYST, AND A SYNERGISTIC COMBINATION OF CERTAIN BASES AND A HALOGENATED ORGANIC COMPOUND.
Inventors
- 👤 Ronald H Sunseri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:35
CPC Classifications
C; C08; C08F; C08F210/00
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |