Production method of combined phosphorus fertilizer and soil conditioner
CA 1287746 C · Owner: Wahlberg, Arvo, (Deceased) · Inventors: Wahlberg, Arvo, (Deceased)
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for producing combined phosphorus fertilizer and soil conditioner in which phosphate rock and as reaction, matter, organic acidic matter are used. In a method according to the invention, the acidic mass is organic for instance, bark, waste, peat, waste fibre from a pulp or paper mill sawdust or, similar matter.
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
- Granted August 20, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 20, 2008.
- 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.