Phytoadditives for enhanced soil bioremediation
CA 2186632 C · Owner: Savage, David William · Inventors: Varadaraj, Ramesh; Savage, David William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bioremediation process is provided comprising adding cedar pieces to a hydrocarbon contaminated soil in an amount ranging from about 5 to about 15 wt.% based on the weight of the contaminated soil and applying sufficient nitrogen and phosphorous nutrients to the soil to provide a C:N:P ratio in the range of about 100:10:1 to about 100:1:0:1.
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 September 26, 1996 and granted December 7, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 26, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 26, 2018.
- 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.