US2494583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyrolysis of c-acetoxy aliphatic amides to acrylamides
Assignee: Individual
•
Filing: 1946-04-16
•
Granted: 1950-01-17
•
Expires: 1966-04-16
Abstract
No abstract record available.
Inventors
- 👤 William P Ratchford
- 👤 Charles H Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:50
CPC Classifications
C; C07; C07C; C07C233/00; C07C233/01; C07C233/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
63 words
THE PROCESS OF PREPARING AN N-LOWER ALKYL AMIDE OF AN ALPHA-BETA UNSATURATED ALIPHATIC CARBOXYLIC ACID COMPRISING PYROLYZING AN N-LOWER ALKYL AMIDE OF A C-ALKANOYLOXY LOWER FATTY ACID HAVING MORE THAN TWO CARBON ATOMS, THE ALKANALYLOXY GROUP BEING IN ONE OF THE POSITIONS ALPHA AND BETA, THE OTHER OF THE POSITIONS ALPHA AND BETA HAVING A HYDROGEN ATOM, THE C-ALKANOYLOXY GROUP BEING A LOWER
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-16 | 1953-07-18 | 1954-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-16 | 1957-07-18 | 1958-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-16 | 1961-07-18 | 1962-01-17 | $7700.00 | Window Closed / Lapsed |