US3775391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinyl polymerisation
Assignee: Imperial Chemical Industries Ltd
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Filing: 1971-11-08
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Granted: 1973-11-27
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Expires: 1991-11-08
Abstract
Abstract POLYMERISATION OF VINYL OR VINYLIDENE HALIDES USING AS INITIATOR A MIXTURE OF A TRANSITION METAL COMPOUND AND AN ORGANOALUMINUM OR ORGANOZINC COMPOUND INCLUDING A LIGAND DERIVED FROM AN OXIME OR A HYDROXY ESTER. THE TRANSITION METAL COMPOUND IS CHEMICALLY BONDED TO AN INERT MATRIX MATERIAL HAVING A HYDROXYLIC SURFACE, FOR EXAMPLE SILICA OR ALUMINA. ALSO, INITIATOR COMPOSITIONS FOR USE IN SUCH A PROCESS.
Inventors
- 👤 J Jennings
- 👤 P Roberts
- 👤 D Simon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:26
CPC Classifications
C; C08; C08F; C08F14/00
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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |