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Patent US2834768A successfully refreshed from Google Patents.
US2834768A
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Catalytic polymerization of alkenes to normally solid polymers
Assignee: Standard Oil Co
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Filing: 1955-08-18
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Granted: 1958-05-13
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Expires: 1975-08-18
Abstract
No abstract record available.
Inventors
- 👤 Herbert N Friedlander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:00
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A PROCESS FOR THE PRODUCTION OF A NORMALLY SOLID POLYMER FROM A NORMALLY GASEOUS UNBRANCHED ALKENE, WHICH PROCESS COMPRISES CONTACTING SAID ALKENE UNDER POLYMERIZATION CONDITIONS WITH A CATALYST PREPARED BY MIXING A METAL ALUMINUM HYDRIDE WITH A BORON HALIDE IN A PROPORTION SUFFICIENT TO PROVIDE AN ATOMIC AL:B RATIO OF AT LEAST ONE, AND RECOVERING A NORMALLY SOLID POLYMER THUS PRODUCED.
Claim 2
Dependent Claim
61 words
A PROCESS FOR THE PRODUCTION OF A NORMALLY SOLID POLYMER FROM A NORMALLY GASEOUS UNBRANCHED ALKENE, WHICH PROCESS COMPRISES CONTACTING SAID ALKENE UNDER POLYMERIZATION CONDITIONS WITH A CATALYST PREPARED BY MIXING A METAL ALUMINUM HYDRIDE WITH A BORON HALIDE IN A PROPORTION SUFFICIENT TO PROVIDE AN ATOMIC AL:B RATIO OF AT LEAST ONE, AND RECOVERING A NORMALLY SOLID POLYMER THUS PRODUCED.
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) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |