US2980663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerisation process
Assignee: Distillers Co Yeast Ltd
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Filing: 1957-03-25
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Granted: 1961-04-18
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Expires: 1977-03-25
Abstract
No abstract record available.
Inventors
- 👤 Lachowicz Stefan Kazimierz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:36
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A PROCESS FOR THE POLYMERISATION OF ALIPHATIC AOLEFINS HAVING THE FORMULA CH2=CHR WHERE R IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND LOWER ALKYL GROUPS, WHICH COMPRISES CONTACTING THE A-OLEFIN IN AN INERT LIQUID MEDIUM AT A TEMPERATURE BELOW 60*C. AND AT A PRESSURE WITHIN THE RANGE FROM ATMOSPHERIC PRESSURE TO ABOUT 500 P.S.I.G WITH A CATALYST SYSTEM FORMED BY MIXING A SOLID, DISPERSED ALUMINUM FLOURIDE COMPOUND, HAVING THE FORMULA NA(AL(CH2H5)3F), WITH A TITANIUM COMPOUND SOLUBLE IN THE LIQUID MEDIUM.
Claim 2
Dependent Claim
81 words
A PROCESS FOR THE POLYMERISATION OF ALIPHATIC AOLEFINS HAVING THE FORMULA CH2=CHR WHERE R IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND LOWER ALKYL GROUPS, WHICH COMPRISES CONTACTING THE A-OLEFIN IN AN INERT LIQUID MEDIUM AT A TEMPERATURE BELOW 60*C. AND AT A PRESSURE WITHIN THE RANGE FROM ATMOSPHERIC PRESSURE TO ABOUT 500 P.S.I.G WITH A CATALYST SYSTEM FORMED BY MIXING A SOLID, DISPERSED ALUMINUM FLOURIDE COMPOUND, HAVING THE FORMULA NA(AL(CH2H5)3F), WITH A TITANIUM COMPOUND SOLUBLE IN THE LIQUID MEDIUM.
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) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |