Herbicidal compositions
CA 2065523 C · Owner: Hewett, Richard Henry · Inventors: Luscombe, Brian Malcolm; Hewett, Richard Henry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Herbicidal compositions comprising (a) bromoxynil and (b) a 2-benzoylcyclohexane-1,3-dione derivative of general formula I:, I, wherein, (i) Z represents the hydrogen atom; R1 and R2, which may be the same or different each represents the hydrogen atom or the methyl group R3 and R4, which may be the same or different each represents the hydrogen atom or the methyl group X represents the chlorine atom or the nitro group, Y represents the methylsulphonyl or trifluoromethyl group; or, (ii) Z represents the chlorine atom; R1, R2, R3 and R4 each represent the hydrogen atom, X represents the chlorine atom; and Y represents the methylsulphonyl group; salts thereof with agriculturally acceptable …
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
- Filed April 7, 1992 and granted October 18, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 7, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 7, 2014.
- 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.