Patent US3058969A successfully refreshed from Google Patents.
US3058969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three-component metal hydride-transi-
Assignee: —
•
Filing: —
•
Granted: 1962-10-16
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Expires: 1979-10-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:31
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
98 words
IN THE POLYMERIZATION OF PROPYLENE TO FORM SOLID CRYSTALLINE POLYMER, THE IMPROVEMENT WHICH COMPRISES CATALYZING THE POLYMERIZATION WITH A CATALYTIC MIXTURE CONSISTING ESSENTIALLY OF AN INORGANIC HYDRIDE SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL HYDRIDES, ALKALINE EARTH METAL HYDRIDES AND ALKALI METAL ALUMINUM HYDRIDES, A TITANIUM CHLORIDE AND AN ARSINE HAVING THE FORMULA R3AS WHEREIN EACH R IS A HYDROCARBON RADICAL SELECTED FROM THE GROUP CONSISTING OF ALKYL RADICALS CONTAINING 1 TO 12 CARBON ATOMS AND PHENYL, THE MOLE RATIO OF INORGANIC HYDRIDE TO ARSINE IN SAID CATALYTIC MIXTURE BEING WITHIN THE RANGE OF 1:1 TO 1:0.25.
References Cited (Backward Citations)
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Cited
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Cited
US2846427A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-15 | 1966-04-16 | 1966-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-15 | 1970-04-16 | 1970-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-15 | 1974-04-16 | 1974-10-16 | $7700.00 | Window Closed / Lapsed |