US3663451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Olefin polymerization catalysts
Assignee: BP Chemicals Ltd
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Filing: 1970-01-30
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Granted: 1972-05-16
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Expires: 1990-01-30
Abstract
Abstract OLEFIN OLIGOMERIZATION AND POLYMERIZATION CATALYST CONTAINING (A) TRANSITION METAL BONDED TO A CARRIER AND A LIGAND AND (B) AN ALUMINIUM ALKYL. A TYPICAL EMBODIMENT IS THE COMBINATION OF (A) NICKEL BONDED TO SILICA, ALUMINA OR SILICA/ALUMINA AND ACETYLACETONE AND (B) ALUMINUMTRIETHYL.
Inventors
- 👤 Thomas Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:36
CPC Classifications
C; C08; C08F; C08F10/00; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/26; C07C2/32; C07C2/36; C07C2521/00; C07C2521/02; C07C2521/04; C07C2521/06; C07C2521/08; C07C2521/12; C07C2527/00; C07C2527/06; C07C2527/128; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/14; C07C2531/16; C07C2531/22; C07C2531/24; C07C2531/26; C07C2531/28; C07C2531/30
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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |