Patent US4878704A successfully refreshed from Google Patents.
US3061601A
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Gas phase polymerization of olefins
Assignee: Akzo Nobel UK PLC
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Filing: 1960-02-10
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Granted: 1962-10-30
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Expires: 1980-02-10
Abstract
No abstract record available.
Inventors
- 👤 William R Watt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:08
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/18; B01J19/20; B01J8/00; B01J8/08; B01J8/10; C; C08; C08F; C08F10/00; B01J2219/00; B01J2219/18; B01J2219/187; Y; Y10; Y10S; Y10S526/00; Y10S526/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A PROCESS FOR THE POLYMERIZATION OF OLEFIN WHICH COMPRISES COATING A SOLID SURFACE WITH A DISPERSION OF A COORDINATION COMPLEX POLYMERIZATION CATALYST IN A MOLTEN NORMALLY SOLID HYDROCARBON, COOLING THE SURFACE TO SOLIDIFY THE HYDROCARBON, CONTACTING THE COATED SURFACE WITH AN OLEFIN SELECTED FROM THE GROUP CONSISTING OF ETHYLENE, PROPYLENE AND BUTENE-1 AND MIXTURES THEREOF AT A TEMPERATURE BELOW THE MELTING POINT OF THE HYDROCARBON, WHEREBY TO INITIATE POLYMERIZATION OF THE OLEFIN, AND RECOVERING SOLID POLYMER FROM THE SURFACE.
Claim 2
Dependent Claim
79 words
A PROCESS FOR THE POLYMERIZATION OF OLEFIN WHICH COMPRISES COATING A SOLID SURFACE WITH A DISPERSION OF A COORDINATION COMPLEX POLYMERIZATION CATALYST IN A MOLTEN NORMALLY SOLID HYDROCARBON, COOLING THE SURFACE TO SOLIDIFY THE HYDROCARBON, CONTACTING THE COATED SURFACE WITH AN OLEFIN SELECTED FROM THE GROUP CONSISTING OF ETHYLENE, PROPYLENE AND BUTENE-1 AND MIXTURES THEREOF AT A TEMPERATURE BELOW THE MELTING POINT OF THE HYDROCARBON, WHEREBY TO INITIATE POLYMERIZATION OF THE OLEFIN, AND RECOVERING SOLID POLYMER FROM THE SURFACE.
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) | 1965-10-29 | 1966-04-30 | 1966-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-29 | 1970-04-30 | 1970-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-29 | 1974-04-30 | 1974-10-30 | $7700.00 | Window Closed / Lapsed |