US3654183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst for polymerization of ethylene oxide
Assignee: Texaco Inc
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Filing: 1970-01-26
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Granted: 1972-04-04
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Expires: 1990-01-26
Abstract
Abstract A CATAYLST FOR USE IN THE POLYMNERIZATION OF ETHYLENE OXIDE IS PREPARED BY CONTACTING AN ALKALINE EARTH METAL HEXAMMONIATE WITH A CYCLIC IMINO ETHER IN THE PRESENCE OF AN EXCESS OF LIQUID AMMOINIA AT CONDITIONS SUCH THAT THE AMMONIA REMAINS IN THE LIQUID STATE. THIS CATALYST PREPARATION MAY ALSO BE CARRIED OUT IN THE PRESENCE OF A NORMALLY LIQUID INERT HYDROCARBON SOLVENT.
Inventors
- 👤 Howard Paul Klein
- 👤 Heinz Schulze
- 👤 George Phillip Speranza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:16
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/06; C08G65/08; C08G65/10; C08G65/12
Claims Analysis
Total Claims: 0
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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) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |