Patent US2680733A successfully refreshed from Google Patents.
US2680733A
Expired / Lapsed
US
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Acetals containing a cyanoacetyl group
Assignee: EIDP Inc
•
Filing: 1950-11-02
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Granted: 1954-06-08
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Expires: 1970-11-02
Abstract
No abstract record available.
Inventors
- 👤 Martin Elmore Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:55
CPC Classifications
C; C07; C07C; C07C255/00; G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/327; G03C7/3275
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
4 words
ACETALS OF THE FORMULA:
References Cited (Backward Citations)
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US2211323A
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US2310943A
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US2380033A
Cited
US2282057A
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US2276305A
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US2253078A
Cited
US2415381A
Cited
US2596755A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-07 | 1957-12-07 | 1958-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-07 | 1961-12-07 | 1962-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-07 | 1965-12-07 | 1966-06-08 | $7700.00 | Window Closed / Lapsed |