US2844545A
Expired / Lapsed
US
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Method for the polymerization of olefin oxides with ferric compounds
Assignee: Dow Chemical Co
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Filing: 1956-05-14
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Granted: 1958-07-22
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Expires: 1976-05-14
Abstract
No abstract record available.
Inventors
- 👤 Borkovec Alexej Bohumil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:37
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2642; C08G65/2645; C08G65/266
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
METHOD FOR POLYMERIZING A LOWER OLEFIN OXIDE THAT CONTAINS NOT MORE THAN 4 CARBON ATOMS IN ITS MOLECULE TO FORM A SOLID POLYMERIC MATERIAL WHICH COMPRISES MIXING THE OXIDE WITH A MINOR PROPORTION OF A CATALYST COMPOUND HAVING THE FORMULA: FE(OR)3, WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF ALKYL RADICALS CONTAINING FROM 1 TO 4 CARBON ATOMS, HALOALKYL RADICALS CONTAINING FROM 1 TO 4 CARBON ATOMS AND AROMATIC HYDROCARBON RADICALS CONTAINING FROM 6 TO 10 CARBON ATOMS AND HEATING THE MIXTURE TO MAINTAIN IT AT A TEMPERATURE BETWEEN ABOUT 40*C. AND 150*C. FOR A SUFFICIENT PERIOD OF TIME TO POLYMERIZE THE OXIDE.
Claim 2
Dependent Claim
104 words
METHOD FOR POLYMERIZING A LOWER OLEFIN OXIDE THAT CONTAINS NOT MORE THAN 4 CARBON ATOMS IN ITS MOLECULE TO FORM A SOLID POLYMERIC MATERIAL WHICH COMPRISES MIXING THE OXIDE WITH A MINOR PROPORTION OF A CATALYST COMPOUND HAVING THE FORMULA: FE(OR)3, WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF ALKYL RADICALS CONTAINING FROM 1 TO 4 CARBON ATOMS, HALOALKYL RADICALS CONTAINING FROM 1 TO 4 CARBON ATOMS AND AROMATIC HYDROCARBON RADICALS CONTAINING FROM 6 TO 10 CARBON ATOMS AND HEATING THE MIXTURE TO MAINTAIN IT AT A TEMPERATURE BETWEEN ABOUT 40*C. AND 150*C. FOR A SUFFICIENT PERIOD OF TIME TO POLYMERIZE THE OXIDE.
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) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |