Patent US2578787A successfully refreshed from Google Patents.
US2578787A
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Reduction of enamines
Assignee: Rohm and Haas Co
•
Filing: 1949-04-09
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Granted: 1951-12-18
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Expires: 1969-04-09
Abstract
No abstract record available.
Inventors
- 👤 Benneville Peter L De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:26
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/02; C07D295/027; C07D295/03; C07C; C07C209/00; C07C209/68; C07C209/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
A PROCESS OF PREPARING TERTIARY AMINES WHICH COMPRISES REACTING TOGETHER BELOW 100* C., WITH LIBERATION OF CARBON DIOXIDE, FORMIC ACID AND AN ENAMINE OF THE FORMULA
Claim 2
Dependent Claim
26 words
A PROCESS OF PREPARING TERTIARY AMINES WHICH COMPRISES REACTING TOGETHER BELOW 100* C., WITH LIBERATION OF CARBON DIOXIDE, FORMIC ACID AND AN ENAMINE OF THE FORMULA
References Cited (Backward Citations)
DE297847C
Cited
US2108147A
Cited
US2101332A
Cited
US2101333A
Cited
US2273141A
Cited
US2163099A
Cited
US2339314A
Cited
US2366534A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-17 | 1955-06-18 | 1955-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-17 | 1959-06-18 | 1959-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-17 | 1963-06-18 | 1963-12-18 | $7700.00 | Window Closed / Lapsed |