Patent US3023203A successfully refreshed from Google Patents.
US3023203A
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Polymerization process
Assignee: Phillips Petroleum Co
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Filing: 1957-08-16
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Granted: 1962-02-27
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Expires: 1977-08-16
Abstract
No abstract record available.
Inventors
- 👤 Robert F Dye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:50
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/901; Y10S526/908
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A PROCESS FOR PRODUCING SOLID POLYMERS COMPRISES CONTACTING A GASEOUS STREAM CONTAINING A POLYMERIZABLE OLEFIN WITH MOBILE COMMINUTED SOLID CATALYST, WHICH CATALYZES THE POLYMERIZATION OF SAID OLEFIN TO SOLID POLYMER, IN A POLYMERIZATION ZONE MAINTAINED AT SUPERATMOSPHERIC PRESSURE AND AT A TEMPERATURE HIGH ENOUGH TO EFFECT SAID POLYMERIZATION BUT BELOW THE MELTING POINT OF THE POLYMER FORMED; REMOVING POLYMER FROM A PRODUCT RECOVERY ZONE INTO WHICH POLYMER COATED CATALYST PARTICLES SETTLED FROM SAID POLYMERIZATION ZONE, THE REMOVAL BEING EFFECTED WITHOUT ANY PRESSURE LETSOWN IN SAID POLYMERIZATION ZONE; WITHDRAWING A GASEOUS STREAM FROM THE UPPER PORTION OF SAID POLYMERIZATION ZONE; RETURNING SAID GASEOUS STREAM TO SAID POLYMERIZATION ZONE; AND ADJUSTING THE TEMPERATURE OF SAID RETURNED GASEOUS STREAM IN RESPONSE TO THE TEMPERATURE MAINTAINED WITHINN SAID POLYMERIZATION ZONE.
Claim 2
Dependent Claim
126 words
A PROCESS FOR PRODUCING SOLID POLYMERS COMPRISES CONTACTING A GASEOUS STREAM CONTAINING A POLYMERIZABLE OLEFIN WITH MOBILE COMMINUTED SOLID CATALYST, WHICH CATALYZES THE POLYMERIZATION OF SAID OLEFIN TO SOLID POLYMER, IN A POLYMERIZATION ZONE MAINTAINED AT SUPERATMOSPHERIC PRESSURE AND AT A TEMPERATURE HIGH ENOUGH TO EFFECT SAID POLYMERIZATION BUT BELOW THE MELTING POINT OF THE POLYMER FORMED; REMOVING POLYMER FROM A PRODUCT RECOVERY ZONE INTO WHICH POLYMER COATED CATALYST PARTICLES SETTLED FROM SAID POLYMERIZATION ZONE, THE REMOVAL BEING EFFECTED WITHOUT ANY PRESSURE LETSOWN IN SAID POLYMERIZATION ZONE; WITHDRAWING A GASEOUS STREAM FROM THE UPPER PORTION OF SAID POLYMERIZATION ZONE; RETURNING SAID GASEOUS STREAM TO SAID POLYMERIZATION ZONE; AND ADJUSTING THE TEMPERATURE OF SAID RETURNED GASEOUS STREAM IN RESPONSE TO THE TEMPERATURE MAINTAINED WITHINN SAID POLYMERIZATION ZONE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-26 | 1965-08-28 | 1966-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-26 | 1969-08-28 | 1970-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-26 | 1973-08-28 | 1974-02-27 | $7700.00 | Window Closed / Lapsed |