Patent US2500942A successfully refreshed from Google Patents.
US2500942A
Expired / Lapsed
US
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Ethers of beta-hydroxyadiponitrile
Assignee: EIDP Inc
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Filing: 1948-04-13
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Granted: 1950-03-21
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Expires: 1968-04-13
Abstract
No abstract record available.
Inventors
- 👤 Glenn F Hager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:20
CPC Classifications
C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
7 words
AN ETHER OF BETA-HYDROXYADIPONITRILE HAVING THE FORMULA
References Cited (Backward Citations)
US2144340A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |