Patent US2849477A successfully refreshed from Google Patents.
US2849477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of alpha-acylamino-nitriles
Assignee: Individual
•
Filing: 1957-06-06
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Granted: 1958-08-26
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Expires: 1977-06-06
Abstract
No abstract record available.
Inventors
- 👤 Dornow Alfred
- 👤 Lupfert Siegfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:13
CPC Classifications
C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
A PROCESS WHICH COMPRISES REACTING AN AROMATIC KETONE IMINE WITH AN A-KETO-NITRILE SELECTED FROM THE GROUP CONSISTING OF LOWER ALKANOYL CYANIDES AND ARYLOYL CYANIDES.
Claim 2
Dependent Claim
24 words
A PROCESS WHICH COMPRISES REACTING AN AROMATIC KETONE IMINE WITH AN A-KETO-NITRILE SELECTED FROM THE GROUP CONSISTING OF LOWER ALKANOYL CYANIDES AND ARYLOYL CYANIDES.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |