Method for degradation of polychlorinated biphenyls in soil
CA 2199191 C · Owner: Terra Prima Inc. · Inventors: Abdullah, Shahid
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to a method for the safe and efficient degradation of Polychlorinated biphenyls (PCBs) in PCB contaminated soil into non-hazardous by products. The method comprises adding a culture containing at least six strains of microorganisms capable of degrading PCBs to PCB contaminated soil, mixing the soil and microorganism culture together and maintaining the culture under stringent conditions which promote the growth of the microorganisms and which stimulate the ability of the microorganisms to degrade the PCBs. The method is cost efficient and well suited for decorating soil on a large scale commercial basis.
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 March 5, 1997 and granted May 23, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 5, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 5, 2019.
- 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.