Diphenyl ether herbicides
CA 1270832 C · Owner: Gilmore, Ian J. · Inventors: Clark, Michael T.; Gilmore, Ian J.; Haddock, Ernest
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Herbicidal compositions comprising as active ingredient, a, diphenyl ether derivative of formula wherein R1 represents a hydrogen or halogen atom or an alkyl or haloalkyl group; R2 and R3 each independently represents a hydrogen or halogen atom or an alkyl, haloalkyl nitro or cyano, group; and the substituents A and B have the meanings as defined in the text; the use of such diphenyl ethers as herbicides; certain novel diphenyl ethers within formula I and their preparation.
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 26, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 26, 2007.
- 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.