Patent US3329630A successfully refreshed from Google Patents.
US3329630A
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1, 2-alkylene oxide polymerization using zinc hydride catalyst
Assignee: Goodyear Tire and Rubber Co
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Filing: 1963-12-10
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Granted: 1967-07-04
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Expires: 1983-12-10
Abstract
No abstract record available.
Inventors
- 👤 Stephen S Hirsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:04
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/06; C08G65/08; C08G65/10; C08G65/12; B; B01; B01J; B01J21/00; B01J21/02; B01J27/00; B01J27/24; B01J31/00; B01J31/02; B01J31/12; B01J31/121
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A PROCESS FOR POLYMERIZING 1, 2-ALKYLENE OXIDES WHICH COMPRISES MIXING AT A TEMPERATURE BETWEEN -100*C. AND 80*C. AT LEAST ONE SUCH ALKYLENE OXIDE WITH A CATALYTIC AMOUNT OF ZINC HYDRIDE IN AN INERT ATMOSPHERE UNTIL A POLYMER IF FORMED.
Claim 2
Dependent Claim
39 words
A PROCESS FOR POLYMERIZING 1, 2-ALKYLENE OXIDES WHICH COMPRISES MIXING AT A TEMPERATURE BETWEEN -100*C. AND 80*C. AT LEAST ONE SUCH ALKYLENE OXIDE WITH A CATALYTIC AMOUNT OF ZINC HYDRIDE IN AN INERT ATMOSPHERE UNTIL A POLYMER IF FORMED.
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) | 1970-07-03 | 1971-01-02 | 1971-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-03 | 1975-01-02 | 1975-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-03 | 1979-01-02 | 1979-07-04 | $7700.00 | Window Closed / Lapsed |