Treatment of wood chips and the like
CA 2136143 C · Owner: Nitro-Grow Inc. · Inventors: Heinz, Elroy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is used for the treatment of particulate wood for example chips, shavings and the like. The process involves the addition of anhydrous ammonia to an enclosed pile of wet particulate wood and allowing the ammonia to react with the pile over a period of four to five months. The resultant product is dry highly absorptive wood chips that is used primarily asa soil conditioner.
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 November 18, 1994 and granted October 23, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 18, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 18, 2016.
- 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.