Patent US2974133A successfully refreshed from Google Patents.
US2974133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst of heavy metal compound and polysiloxane and use thereof in olefin polymerization
Assignee: Hoechst AG
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Filing: 1959-02-25
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Granted: 1961-03-07
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Expires: 1979-02-25
Abstract
No abstract record available.
Inventors
- 👤 Wiberg Egon
- 👤 Hartwimmer Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:28
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
21 words
A CATALYT SYSTEM FOR THE POLYMERIZATION OF NORMALLY GASEOUS ALPHA-MONOOLEFINS CONSISTING ESSENTIALLY OF (1) TITANIUM CHLORIDE AND (2) METHYL HYDROGEN POLYSILOXANE.
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) | 1964-03-06 | 1964-09-05 | 1965-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-06 | 1968-09-05 | 1969-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-06 | 1972-09-05 | 1973-03-07 | $7700.00 | Window Closed / Lapsed |