Method of keeping quality of agricultural products and foods
CA 2071562 C · Owner: Kawashima, Koji · Inventors: Nakakita, Hiroshi; Kawashima, Koji; Noguchi, Akinori
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a method of keeping quality of an agricultural product or food with non-residual or little residual treatment of the agricultural product or food. The treatment involves placing the agricultural product or food under 5 to 60 atmospheric pressure. By the method of the present invention insects and mites will be effectively eliminated from the agricultural product or food without causing environmental pollution problems.
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 June 17, 1992 and granted February 24, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 17, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 17, 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.