US2694072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous process for the
Assignee: —
•
Filing: —
•
Granted: 1954-11-09
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Expires: 1971-11-09
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:28
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/56; C07D209/80; C07C; C07C231/00; C07C231/02; C07D209/82; C07D209/88; C07D307/00; C07D307/77; C07D307/78; C07D307/79; C07D307/81
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A CONTINUOUS PROCESS OF PRODUCING CARBOXYLIC ACID AMIDES WHICH COMPRISES CONTINUOUSLY FEEDING INTO A REACTION ZONE A CARBOXYLIC ACID AND AN AMINE REACTANT SELECTED FROM THE GROUP CONSISTING OF PRIMARY AND SECONDARY AMINES IN ABOUT EQUIVALENT AMOUNTS, A LIQUID TERTIARY AMINE AND A CONDENSING AGENT SELECTED FROM THE GROUP CONSISTING OF PHOSPHORUS TRICHLORIDE AND PHOSPHOUS OXYCHLORIDE, IN THE PRESENCE OF AN INERT ATMOSPHERE, AND CONTINUOUSLY REMOVING THE REACTION PRODUCT FROM THE REACTION ZONE UPON COMPLETION OF THE REACTION.
Claim 2
Dependent Claim
78 words
A CONTINUOUS PROCESS OF PRODUCING CARBOXYLIC ACID AMIDES WHICH COMPRISES CONTINUOUSLY FEEDING INTO A REACTION ZONE A CARBOXYLIC ACID AND AN AMINE REACTANT SELECTED FROM THE GROUP CONSISTING OF PRIMARY AND SECONDARY AMINES IN ABOUT EQUIVALENT AMOUNTS, A LIQUID TERTIARY AMINE AND A CONDENSING AGENT SELECTED FROM THE GROUP CONSISTING OF PHOSPHORUS TRICHLORIDE AND PHOSPHOUS OXYCHLORIDE, IN THE PRESENCE OF AN INERT ATMOSPHERE, AND CONTINUOUSLY REMOVING THE REACTION PRODUCT FROM THE REACTION ZONE UPON COMPLETION OF THE REACTION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-08 | 1958-05-10 | 1958-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-08 | 1962-05-10 | 1962-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-08 | 1966-05-10 | 1966-11-09 | $7700.00 | Window Closed / Lapsed |