Crop blower apparatus
CA 2001820 C · Owner: Gullickson, M. Roy · Inventors: Gullickson, M. Roy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A crop blower apparatus includes a blower for providing a stream of forced air. There is a mechanism for powering the blower and a discharge duct connected to the blower for providing a directed curtain of air and a frame for mounting the blower forwardly of the knife of a harvester. There may be a plurality of blowers having discharge ducts which are juxtaposed so as to discharge a substantially continuous curtain of air. The blowers may have coaxial drive shafts which are interconnected.
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 October 26, 1989 and granted June 6, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 26, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 26, 2011.
- 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.