Patent US2987489A successfully refreshed from Google Patents.
US2987489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of epoxides
Assignee: Union Carbide Corp
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Filing: 1958-11-19
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Granted: 1961-06-06
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Expires: 1978-11-19
Abstract
No abstract record available.
Inventors
- 👤 Jr Frederick E Bailey
- 👤 Fred N Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:32
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2642; C08G65/2645
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A PROCESS WHICH COMPRISES CONTACTING A VICINAL-
Claim 2
Dependent Claim
7 words
A PROCESS WHICH COMPRISES CONTACTING A VICINAL-
References Cited (Backward Citations)
US2706181A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |