US3271328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of epoxides in the presence of aluminum alkylate as catalyst
Assignee: Union Carbide Corp
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Filing: 1957-07-30
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Granted: 1966-09-06
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Expires: 1977-07-30
Abstract
No abstract record available.
Inventors
- 👤 Fred N Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:53
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/06; C08G65/08; C08G65/10; C08G65/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A PROCESS FOR THE PRODUCTION OF A SOLID POLYMER OF ETHYLENE OXIDE WHICH COMPRISES POLYMERIZING ETHYLENE OXIDE AT ABOUT 25*C. TO 150*C. IN THE PRESENCE OF A CATALYTIC QUANTITY OF ALUMINUM C1-C4 ALKYLATE.
Claim 2
Dependent Claim
33 words
A PROCESS FOR THE PRODUCTION OF A SOLID POLYMER OF ETHYLENE OXIDE WHICH COMPRISES POLYMERIZING ETHYLENE OXIDE AT ABOUT 25*C. TO 150*C. IN THE PRESENCE OF A CATALYTIC QUANTITY OF ALUMINUM C1-C4 ALKYLATE.
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) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |