Process and composition for controlling weeds
CA 2296940 C · Owner: Zorner, Paul S. · Inventors: Crowley, R. Hugh; Caulder, Jerry; Zorner, Paul S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Described and claimed are methods and compositions for the control of unwanted vegetation. According to the subject invention a fatty acid or , mixture, of fatty acids can be combined with one or more chemical herbicides to achieve synergistic control of a broad range of plants.
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 November 27, 1991 and granted February 6, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 27, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 27, 2013.
- 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.