US2906742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylene polymerization process
Assignee: Dow Chemical Co
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Filing: 1955-12-08
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Granted: 1959-09-29
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Expires: 1975-12-08
Abstract
No abstract record available.
Inventors
- 👤 Laddie M Thomka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:38
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
A METHOD FOR MAKING A HIGH MOLECULAR WEIGHT POLYMER, WHICH METHOD COMPRISES MAINTAINING IN A POLYMERIZATION REACTION ZONE A BODY OF GAS COMPRISING A POLYMERIZABLE ALPHA-OLEFIN, FEEDING INTO THE BODY OF GAS A LIQUID DISPERISION OF A COMPLEX ORGANO-METAL CATALYST, THE CATALYST HAVING BEEN FORMED BY ADMIXING IN AN INERT LIQUID DILUENT AN ORGANO-ALUMINUM COMPOUND AND A HEAVIER METAL COMPOUND SELECTED FROM THE GROUPS CONSISTING OF COMPOUNDS OF METALS OF GROUPS IV-B, V-B, AND VI-B OF THE PERIODIC SYSTEM, THE LIQUID DISPERSION BEING FED IN SUCH A MANNER AS TO CAUSE SUBDIVISION THEREOF INTO UNSTABLE DISCRETE DROPLETS IN THE BODY OF GAS, MAINTAINING THE GAS PRESSURECIN THE REACTION ZONE BETWEEN ABOUT ONE AND ABOUT 100 ATMOSPHERE AND MAINTAINING THE AVERAGE TEMPERATURE OF THE REACTION MIXTURE BETWEEN 50* AND 150%C., THEREBY POLYMERIZING A PORTION OF THE POLYMERIZABLE ALPHA-OLEFIN IN THE BODY OF GAS IN CONTACT WITHSUCH DROPLET, AND COALESCING THE DROPLET TO OBTAINED A DISPERSION OF POLYMER IN A BODY FOF THE INERT LIQUID DILUENT.
Claim 2
Independent Claim
164 words
A METHOD FOR MAKING A HIGH MOLECULAR WEIGHT POLYMER, WHICH METHOD COMPRISES MAINTAINING IN A POLYMERIZATION REACTION ZONE A BODY OF GAS COMPRISING A POLYMERIZABLE ALPHA-OLEFIN, FEEDING INTO THE BODY OF GAS A LIQUID DISPERISION OF A COMPLEX ORGANO-METAL CATALYST, THE CATALYST HAVING BEEN FORMED BY ADMIXING IN AN INERT LIQUID DILUENT AN ORGANO-ALUMINUM COMPOUND AND A HEAVIER METAL COMPOUND SELECTED FROM THE GROUPS CONSISTING OF COMPOUNDS OF METALS OF GROUPS IV-B, V-B, AND VI-B OF THE PERIODIC SYSTEM, THE LIQUID DISPERSION BEING FED IN SUCH A MANNER AS TO CAUSE SUBDIVISION THEREOF INTO UNSTABLE DISCRETE DROPLETS IN THE BODY OF GAS, MAINTAINING THE GAS PRESSURECIN THE REACTION ZONE BETWEEN ABOUT ONE AND ABOUT 100 ATMOSPHERE AND MAINTAINING THE AVERAGE TEMPERATURE OF THE REACTION MIXTURE BETWEEN 50* AND 150%C., THEREBY POLYMERIZING A PORTION OF THE POLYMERIZABLE ALPHA-OLEFIN IN THE BODY OF GAS IN CONTACT WITHSUCH DROPLET, AND COALESCING THE DROPLET TO OBTAINED A DISPERSION OF POLYMER IN A BODY FOF THE INERT LIQUID DILUENT.
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) | 1962-09-28 | 1963-03-30 | 1963-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-28 | 1967-03-30 | 1967-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-28 | 1971-03-30 | 1971-09-29 | $7700.00 | Window Closed / Lapsed |