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US2422400A
Expired / Lapsed
US
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Production of n-methylamides
Assignee: EIDP Inc
•
Filing: 1944-04-07
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Granted: 1947-06-17
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Expires: 1964-04-07
Abstract
No abstract record available.
Inventors
- 👤 Farlow Mark Wendell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:03
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/04; C07D233/28; C07D233/30; C07D233/32; C07C; C07C273/00; C07C273/18; C07C273/1854
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1990245A
Cited
US2290439A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-16 | 1950-12-16 | 1951-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-16 | 1954-12-16 | 1955-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-16 | 1958-12-16 | 1959-06-17 | $7700.00 | Window Closed / Lapsed |