US3114718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for improving the catalytic activity of the titanium tetrachloridezinc dimethyl system
Assignee: DuPont Canada Inc
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Filing: 1960-11-21
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Granted: 1963-12-17
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Expires: 1980-11-21
Abstract
No abstract record available.
Inventors
- 👤 Elston Clayton Trevor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:47
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
IN THE PREPARATION OF ACTIVE COORDINATION CATALYSTS FROM TITANIUM TETRAHALIDES AND ORGANOZINC COMPOUNDS, THE IMPROVEMENT WHICH COMPRISES REFLUXING A TITANIUM TETRAHALIDE IN AN INERT SOLVENT WITH A SUBSTANTIALLY EQUIMOLAR AMOUNT OF AN ORGANOZINC COMPOUND SELECTED FROM THE CLASS CONSISTING OF ZINC DIMETHYL AND ZINE METHYL HALIDE, REMOVING SUBSTANTIALLY ALL OF THE ZINC COMPOUNDS SUBSEQUENT TO SUCH REFLUXING, AND CONVERTING THE PREREDUCED TITANIUM COMPOUND INTO AN ACTIVE CATALYTIC SPECIES COMPRISING TITANIUM IN A REDUCED VALENCE STATE BY EXPOSING SAID PREREDUCED TITANIUM COMPOUND TO AN ACTIVATOR SELECTED FROM THE CLASS CONSISTING OF IRRADIATION AND HEAT.
Claim 2
Dependent Claim
93 words
IN THE PREPARATION OF ACTIVE COORDINATION CATALYSTS FROM TITANIUM TETRAHALIDES AND ORGANOZINC COMPOUNDS, THE IMPROVEMENT WHICH COMPRISES REFLUXING A TITANIUM TETRAHALIDE IN AN INERT SOLVENT WITH A SUBSTANTIALLY EQUIMOLAR AMOUNT OF AN ORGANOZINC COMPOUND SELECTED FROM THE CLASS CONSISTING OF ZINC DIMETHYL AND ZINE METHYL HALIDE, REMOVING SUBSTANTIALLY ALL OF THE ZINC COMPOUNDS SUBSEQUENT TO SUCH REFLUXING, AND CONVERTING THE PREREDUCED TITANIUM COMPOUND INTO AN ACTIVE CATALYTIC SPECIES COMPRISING TITANIUM IN A REDUCED VALENCE STATE BY EXPOSING SAID PREREDUCED TITANIUM COMPOUND TO AN ACTIVATOR SELECTED FROM THE CLASS CONSISTING OF IRRADIATION AND HEAT.
References Cited (Backward Citations)
BE548895A
Cited
US2911401A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-12-16 | 1967-06-17 | 1967-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-16 | 1971-06-17 | 1971-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-16 | 1975-06-17 | 1975-12-17 | $7700.00 | Window Closed / Lapsed |