US2873258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization process for olefin oxides
Assignee: Dow Chemical Co
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Filing: 1957-06-06
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Granted: 1959-02-10
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Expires: 1977-06-06
Abstract
No abstract record available.
Inventors
- 👤 Borkovec Alexej Bohumil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:54
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2642; C08G65/2645; C08G65/266; C08G65/269
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
PROCESS FOR POLYMERIZING A LOWER VICINAL OLEFIN OXIDE THAT DOES NOT CONTAIN MOR 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 THAT CONSISTS OF A PARTIALLY HYDROLYZED FERRIC COMPOUND THAT HAS BEEN DERIVED BY INCOMPLETE HYDROLYSIS OF A PARENT FERRIC COMPOUND WHICH IS A REACTION PRODUCT OF A FERRIC HALIDE AND PROPYLENE OXIDE CORRESPONDING TO THE EMPIRICAL FORMULA FEX3.(C3H6O)N, WHEREIN X IS A HALOGEN OF ATOMIC NUMBER FROM 17 TO 35 AND N HAS A VALUE FROM 2 TO 6; AND HEATING THE MIXTURE TO MAINTAIN IT AT A TEMPERATURE BETWEEN ABOUT 40*C. AND 100*C. FOR A SUFFICIENT PERIOD OF TIME TO POLYMERIZE THE OXIDE.
Claim 2
Dependent Claim
123 words
PROCESS FOR POLYMERIZING A LOWER VICINAL OLEFIN OXIDE THAT DOES NOT CONTAIN MOR 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 THAT CONSISTS OF A PARTIALLY HYDROLYZED FERRIC COMPOUND THAT HAS BEEN DERIVED BY INCOMPLETE HYDROLYSIS OF A PARENT FERRIC COMPOUND WHICH IS A REACTION PRODUCT OF A FERRIC HALIDE AND PROPYLENE OXIDE CORRESPONDING TO THE EMPIRICAL FORMULA FEX3.(C3H6O)N, WHEREIN X IS A HALOGEN OF ATOMIC NUMBER FROM 17 TO 35 AND N HAS A VALUE FROM 2 TO 6; AND HEATING THE MIXTURE TO MAINTAIN IT AT A TEMPERATURE BETWEEN ABOUT 40*C. AND 100*C. FOR A SUFFICIENT PERIOD OF TIME TO POLYMERIZE THE OXIDE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-09 | 1962-08-11 | 1963-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-09 | 1966-08-11 | 1967-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-09 | 1970-08-11 | 1971-02-10 | $7700.00 | Window Closed / Lapsed |