US2864850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing 1, 1-dicyano ethyl substituted 1, 3-diketones
Assignee: Goodrich Corp
•
Filing: 1957-04-15
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Granted: 1958-12-16
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Expires: 1977-04-15
Abstract
No abstract record available.
Inventors
- 👤 Jerome C Westfahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:07
CPC Classifications
C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A METHOD OF PREPARING COMPOUNDS HAVING AT LEAST ONE -CH2-CH(CN)2 SUBSTITUENT IN PLACE OF AT LEAST ONE HYDROGEN ATOM OF A METHYLENE GROUP ATTACHED TO TWO CARBONYL CARBON ATOMS COMPRISING REACTING A COMPOUND HAVING A
Claim 2
Independent Claim
35 words
A METHOD OF PREPARING COMPOUNDS HAVING AT LEAST ONE -CH2-CH(CN)2 SUBSTITUENT IN PLACE OF AT LEAST ONE HYDROGEN ATOM OF A METHYLENE GROUP ATTACHED TO TWO CARBONYL CARBON ATOMS COMPRISING REACTING A COMPOUND HAVING A
References Cited (Backward Citations)
US2804469A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-15 | 1962-06-16 | 1962-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-15 | 1966-06-16 | 1966-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-15 | 1970-06-16 | 1970-12-16 | $7700.00 | Window Closed / Lapsed |