Patent US3732198A successfully refreshed from Google Patents.
US3732198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerisation of ethylene
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1970-01-19
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Granted: 1973-05-08
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Expires: 1990-01-19
Abstract
Abstract ETHYLENE IS POLYMERISED AT PRESSURES ABOVE 1,000 KG./ CM.2 USING A CATALYST COMPRISING A COMPOUND OF A TRANSITION METAL AND IN THE PRESENCE OF FROM 0.5 TO 20% BY WEIGHT ON THE ETHYLENE MONOMER) OF A COMPOUND CONTAINING A SPECIFIED ALLYLIC GROUP.
Inventors
- 👤 K Whiteley
- 👤 R Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:21
CPC Classifications
C; C08; C08F; C08F10/00; C08F10/02; 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) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |