Granular fertilizer with a decomposable coating and process for producing the same
CA 1295849 C · Owner: Chisso Corporation · Inventors: Fujita, Toshio; Yamashita, Yoshisato; Yoshida, Shigemitsu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A granular fertilizer with a coating which is decomposable by soil microorganisms, preferably a coating which is decomposed and degraded both on the surface layer of the soil and in the soil and, a process for producing the granular fertilizer which coating contains a poly 3-hydroxy-3-alkylpropionic acid as an indispensable ingredient, and if necessary a resin or a low-molecular resin and further if, necessary, an inorganic or organic powder and which, process comprises adding an organic solvent solution of the poly 3-hydroxy-3-alkylpropionic acid and if, necessary, the resin, and if necessary the powder (dispersed in the solution) to a granular fertilizer in fluided state in the form of …
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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
- Granted February 18, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 18, 2009.
- 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.