US3694412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing interpolymers of carbon monoxide in the presence of aryl phosphine-palladium halide complex
Assignee: Shell USA Inc
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Filing: 1971-03-04
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Granted: 1972-09-26
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Expires: 1991-03-04
Abstract
Abstract HIGH MELTING, HIGH MOLECULAR WEIGHT INTERPOLYMERS OF CARBON MONOXIDE WITH AT LEAST ONE UNSATURATED COMPOUND SUCH AS THE ALIPHATIC MONOOLEFINS, I.E., ETHYLENE, ARE PREPARED BY REACTING CARBON MONOXIDE WITH SAID UNSATURATED COMPOUNDS IN THE PRESENCE OF AN ARYL PHOSPHINE COMPLEX OF A PALLADIUM HALIDE AND CERTAIN INERT SOLVENTS.
Inventors
- 👤 Kenzie Nozaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:54
CPC Classifications
C; C08; C08G; C08G67/00; C08G67/02
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) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |