Calcium agent for plants
CA 2107709 C · Owner: Inoue, Tadashi · Inventors: Kato, Hitoshi; Inoue, Tadashi; Matsubara, Yorihiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An object of this invention is to obtain a calcium agent for plants, which enters into cells of a plant so as to derive the physiological activity basically for DNA and RNA activation and to enhance the absorbability of calcium into the living plant. Therefore the calcium agent for plants, contains as, main components, water-soluble low molecular weight chitosan having an average molecular weight of 500 to 30000 consisting of chitosan and/or chito-oligosaccharide and/or derivatives thereof, an inorganic substance including calcium element and/or a water-soluble organic substance including calcium element, and if necessary water-soluble organic acid. By administering this calcium agent, lime …
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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 5, 1993 and granted December 1, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 5, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 5, 2015.
- 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.