US3640987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing titanium trichloride the catalysts obtained therefrom and their uses in the polymerization of polymerizable monomers
Assignee: IFP Energies nouvelles
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Filing: 1968-06-03
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Granted: 1972-02-08
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Expires: 1988-06-03
Abstract
Abstract THE PRESENT DISCLOSURE IS DIRECTED TO A PROCESS FOR MANUFACTURING TITANIUM TRICHLORIDE BY REDUCING TITANIUM TETRACHLORIDE UTILIZING AT LEAST ONE REDUCING COMPOUND OF A METAL OF GROUPS I TO III, IN AND INERT SOLVENT. THE PROCESS IS CARRIED OUT IN TWO STEPS, THE FIRST STEP BEING CONDUCTED AT A TEMPERATURE LOWER THAN ABOUT 50*C. AND THE SECOND STEP BEING CONDUCTED AT A TEMPERATURE HIGHER THAN ABOUT 75*C. IN THE FIRST STEP, THE SOLVENT HAS A NORMAL BOILING POINT LOWER THAN 140*C. AND IN THE SECOND STEP THE SOLVENT HAS A NORMAL BOILING POINT HIGHER THAN 140*C.
Inventors
- 👤 Nhu Hung Phung
- 👤 Gilles Le Febvre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:20
CPC Classifications
C; C08; C08F; C08F110/00; B; B01; B01J; B01J27/00; B01J27/06; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52; Y10; Y10S; Y10S526/00; Y10S526/907
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |