Substituted pyridine 1-oxide herbicides
CA 1164867 A · Owner: Uniroyal Ltd. · Inventors: Doweyko, Arthur M.; Bell, Allyn R.; Dekeyser, Mark A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of the following formula are effective as premergence herbicides:, wherein R and R1 may be the same or different and are C1 to C4 alkyl, C1 to C4 alkoxy, phenyl or halogen provided that R or R1, is not halogen if attached in the 3- position of the pyridine ring and R or R1 may further be hydrogen provided that one of them is one of the recited moieties other than hydrogen; R2 is hydrogen halogen, methyl or ethyl; R3 is phenyl or phenyl substituted with halogen, C1 to C4 alkyl, C1 to C4 alkoxy or nitro; and n is 1 or, 2.
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 April 3, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 3, 2001.
- 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.