Intermediates useful in the preparation of herbicidal compounds
CA 1256446 A · Owner: Rhone-Poulenc Agrochimie · Inventors: Lacroix, Guy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
INTERMEDIATES USEFUL IN THE PREPAPATION OF HERBICIDAL COMPOUNDS", Compounds of the formula: (II), in which R2' and R3' are such that OR2' and OR3' are hydrolysable groups, R8 is a hydrogenolysable group and R7 is as defined for R2' and R3' are intermediates useful for the preparation of herbicidal compounds.
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 June 27, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 27, 2006.
- 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.