Fertilization of trees
CA 2115258 C · Owner: Lojek, John S. · Inventors: Lojek, John S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Trees are fertilized with natural ingredients commonly used in the feed industry to prevent combat and, reverse die-back damage in trees. The fertilizer composition employed preferably uses feather meal or blood meal, and bone meal, along with sulfate of potash or sulfate of potash magnesia to provide a ratio of N:P:K of about 4:4:8 wt%.
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 August 6, 1992 and granted October 12, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 6, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 6, 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.