Process for remediation of contaminated soil
CA 2255437 C · Owner: Kato, Kinya · Inventors: Sakuranaga, Masanori; Kato, Kinya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Provided is a process for remedying a contaminated soil characterized in that a contaminated region of the ground is purified by the steps of first freezing the contaminated region, then injecting to the same a microorganism and a liquid agent or gas which is required for a biological treatment using the microorganism's ability to decomposing a pollutant to, enable more efficient and rapid remediation.
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 December 10, 1998 and granted June 3, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 10, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 10, 2020.
- 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.