US3135702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization catalyst
Assignee: Stamicarbon BV
•
Filing: 1959-02-02
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Granted: 1964-06-02
•
Expires: 1979-02-02
Abstract
No abstract record available.
Inventors
- 👤 Vries Harmen De
- 👤 Jacobus P Schuhmacher
- 👤 Johannes C Soeterbroek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:52
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
PROCESS OF PREPARING CATALYSTS COMPRISING COMBINATION OF THE FOLLOWING STEPS: REACTING TITANIUM TETRACHLORIDE AT A TEMPERATURE OF 15-20%C. WITH A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF HYDRIDES OF METALS OF THE 1ST-3RD GROUPS OF THE PERIODIC SYSTEM, AND ORGANOMETALLIC COMPOUNDS OF SUCH METALS, HEATING THE TITANIUM TRICHLORIDE FORMED TO A TEMPERATURE WITHIN THE RANGE OF 200350*C. FOR A PERIOD OF 20-45 MINUTES, AND THEREAFTER ADDING AN ALUMINUM TRIALKYL TO THE REACTION PRODUCT SO HEATED.
Claim 2
Dependent Claim
75 words
PROCESS OF PREPARING CATALYSTS COMPRISING COMBINATION OF THE FOLLOWING STEPS: REACTING TITANIUM TETRACHLORIDE AT A TEMPERATURE OF 15-20%C. WITH A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF HYDRIDES OF METALS OF THE 1ST-3RD GROUPS OF THE PERIODIC SYSTEM, AND ORGANOMETALLIC COMPOUNDS OF SUCH METALS, HEATING THE TITANIUM TRICHLORIDE FORMED TO A TEMPERATURE WITHIN THE RANGE OF 200350*C. FOR A PERIOD OF 20-45 MINUTES, AND THEREAFTER ADDING AN ALUMINUM TRIALKYL TO THE REACTION PRODUCT SO HEATED.
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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) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |