Patent US2317401A successfully refreshed from Google Patents.
Patent US3109838A successfully refreshed from Google Patents.
US3109838A
Expired / Lapsed
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Polymerization catalysts and processes
Assignee: Imperial Chemical Industries Ltd
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Filing: 1959-01-19
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Granted: 1963-11-05
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Expires: 1979-01-19
Abstract
No abstract record available.
Inventors
- 👤 Chatt Joseph
- 👤 Small Percy Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:28
CPC Classifications
C; C08; C08F; C08F10/00; C07; C07F; C07F5/00; C07F5/06; C07F5/061; C07F5/064; C08F136/00; C08F136/02; C08F136/04; C08F36/00; C08F36/02; C08F36/04; C08F110/00; C08F110/02; C08F110/04; C08F110/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A POLYMERIZATION CATALYST PREPARED BY TREATING TITANIUM TRICHLORIDE WITH A COMPOUND A HAVING REPEATING UNITS OF THE FORMULA (CH2AIR) WHERE R IS AN ALKYL RADICAL, SAID COMPOUND HAVING BEEN OBTAINED BY REACTING AN ALUMINUM TRIALKYL WITH A COMPOUND B OBTAINED BY REACTING A COMPOUND OF THE FORMULA CH2X2, IN WHICH X IS A HALOGEN, WITH ALUMINUM.
Claim 2
Dependent Claim
56 words
A POLYMERIZATION CATALYST PREPARED BY TREATING TITANIUM TRICHLORIDE WITH A COMPOUND A HAVING REPEATING UNITS OF THE FORMULA (CH2AIR) WHERE R IS AN ALKYL RADICAL, SAID COMPOUND HAVING BEEN OBTAINED BY REACTING AN ALUMINUM TRIALKYL WITH A COMPOUND B OBTAINED BY REACTING A COMPOUND OF THE FORMULA CH2X2, IN WHICH X IS A HALOGEN, WITH ALUMINUM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-11-04 | 1967-05-06 | 1967-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-04 | 1971-05-06 | 1971-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-04 | 1975-05-06 | 1975-11-05 | $7700.00 | Window Closed / Lapsed |