US3047557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for polymerizing olefins with catalysts of ticl dialkyl aluminum fluorides in combination with another dialkyl aluminum halide
Assignee: Hoechst AG
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Filing: 1958-10-14
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Granted: 1962-07-31
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Expires: 1978-10-14
Abstract
No abstract record available.
Inventors
- 👤 Rust Kurt
- 👤 Junghanns Ernst
- 👤 Sommer Siegfried
- 👤 Bier Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:20
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
AN IMPROVED PROCESS FOR THE PREPARATION OF ISOTACTIC POLYPROPYLENE WHICH COMPRISES CONTACTING PROPYLENE WITH TICI3 UNDER ATMOSPHERIC PRESSURE THE TICI3 BEING ACTIVATED BY ADDING TO THE SYSTEM A 1:1 MIXTURE OF ALUMINUM DIETHYL CHLORIDE AND ALUMINUM DIETHYL FLUORIDE, AND RECOVERING POLYPROPYLENE HAVING AN ISOTACTIC CONTENT EXCEEDING 90%.
Claim 2
Dependent Claim
47 words
AN IMPROVED PROCESS FOR THE PREPARATION OF ISOTACTIC POLYPROPYLENE WHICH COMPRISES CONTACTING PROPYLENE WITH TICI3 UNDER ATMOSPHERIC PRESSURE THE TICI3 BEING ACTIVATED BY ADDING TO THE SYSTEM A 1:1 MIXTURE OF ALUMINUM DIETHYL CHLORIDE AND ALUMINUM DIETHYL FLUORIDE, AND RECOVERING POLYPROPYLENE HAVING AN ISOTACTIC CONTENT EXCEEDING 90%.
References Cited (Backward Citations)
GB785314A
Cited
US2939846A
Cited
US2840551A
Cited
US2827446A
Cited
US2843577A
Cited
US2893984A
Cited
US2914520A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-30 | 1966-01-29 | 1966-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-30 | 1970-01-29 | 1970-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-30 | 1974-01-29 | 1974-07-31 | $7700.00 | Window Closed / Lapsed |