Spraying apparatus
CA 2120239 C · Owner: Payne, Nicholas J. · Inventors: Payne, Nicholas J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a spraying apparatus (10) and a method of using the same. The spraying apparatus (10) can be used in the spraying of herbicides or insecticides from an aircraft or from the ground. The apparatus provides separation means to remove the small drop component of the spray (45) so that the component leaving the apparatus is essentially free of small drops. Small drops have slight fallspeeds and are subject to wind drift causing off-target deposits and potential biological impact outside the treatment areas.
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 September 29, 1992 and granted July 29, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 29, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 29, 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.