Windrow turning apparatus
CA 2223352 C · Owner: Laing, Murray Robert · Inventors: Laing, Murray Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A windrow turning apparatus which mounts to a front of a tractor and has a first rake support assembly and a second rake support assembly. The rake support assemblies support rotary raking wheels at an angle in relation to a support frame extending from a forward end outwardly toward a tractor attachment end. A farmer can lower either the first rake support assembly or the second rake support assembly to an operative position, depending upon the direction that windrow needs to be turned in order to maintain consistent windrow spacing.
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 December 3, 1997 and granted November 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 3, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 3, 2019.
- 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.