Patent US2914491A successfully refreshed from Google Patents.
US2914491A
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Polymerization of epoxides with finely divided alkaline earth metal oxides
Assignee: Union Carbide Corp
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Filing: 1958-03-03
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Granted: 1959-11-24
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Expires: 1978-03-03
Abstract
No abstract record available.
Inventors
- 👤 Jr Frederick E Bailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:43
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2642; C08G65/2645; C08G65/2651
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A PROCESS WHICH COMPRISES CONTACTING MONOMERIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF (A) ETHYLENE OXIDE AND (B) AN ADMIXTURE OF ETHYLENE OXIDE WITH AN ALKYLENE OXIDE HAVING FROM 3 TO 4 CARBON ATOMS, SAID ADMIXTURE CONTAINING AT LEAST ABOUT 50 WEIGHT PERCENT OF ETHYLENE OXIDE, WITH A CATALYSTIC AMOUNT OF PARTICULATE ALKALINE EARTH METAL OXIDE WHICH HAS AN AVERAGE PARTICLE SIZE OF LESS THAN 4,00/ ANGSTROMS IN AVERAGE DIEMETER, AT A TEMPERATURE OF AT LEAST 75*C., AND FOR A PERIOD OF TIME SUFFICIENT TO PRODUCE A SOLID POLYMER.
Claim 2
Dependent Claim
89 words
A PROCESS WHICH COMPRISES CONTACTING MONOMERIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF (A) ETHYLENE OXIDE AND (B) AN ADMIXTURE OF ETHYLENE OXIDE WITH AN ALKYLENE OXIDE HAVING FROM 3 TO 4 CARBON ATOMS, SAID ADMIXTURE CONTAINING AT LEAST ABOUT 50 WEIGHT PERCENT OF ETHYLENE OXIDE, WITH A CATALYSTIC AMOUNT OF PARTICULATE ALKALINE EARTH METAL OXIDE WHICH HAS AN AVERAGE PARTICLE SIZE OF LESS THAN 4,00/ ANGSTROMS IN AVERAGE DIEMETER, AT A TEMPERATURE OF AT LEAST 75*C., AND FOR A PERIOD OF TIME SUFFICIENT TO PRODUCE A SOLID POLYMER.
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) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |