1,6 hexanediamides from 3-pentenamides
CA 1294981 C · Owner: Dubbert, Robert A. · Inventors: Cesa, Mark C.; Burrington, James D.; Dubbert, Robert A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for making a diamide of the formula R7R8N?C(RlR2)C(R3H)-C(R4H)-C(R5R6)?NR7R8 by reacting a monoamide compound of the formula RlR2CH-C(R3)=C(R4)-C(R5R6)?NR7R8, with CO and an amine or ammonia of the formula R7R8NH in the liquid phase under essentially anhydrous conditions at a temperature in the range from 120 to 210°C, where each of R1 R2, R3, R4, R5, R6, R7 and R8 is selected independently from H and a C1 to C12 hydrocarbyl containing no ethylenic or acetylenic unsaturation.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted January 28, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 28, 2009.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.