Process for producing a landfill
CA 2222640 C · Owner: Washuta, Steve · Inventors: Minet, Brent F.; Prange, William A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing a landfill from a specified landfill site is disclosed. In the first step of this process, leachate from the landfill site is collected. Thereafter a specified shredded material is contacted with the leachate to age it, the horizontal permeability of the aged shredded material is then tested with a specified permeability tester; if the test is successful the, shredded material is used in the landfill and covered with waste material.
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 July 14, 1993 and granted May 20, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 14, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 14, 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.