Method and apparatus for testing soil contamination
CA 2187356 C · Owner: Societe D'Expertise Envirotest Ltee. · Inventors: Tarte, Andre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is provided a method and device for the testing of soil containing a contaminant having a volatile constituent. The method involves injecting a first fluid such as air while measuring the concentration of the volatile constituent until the concentration of the volatile constituent has been reduced and subsequently measuring the concentration of the volatile constituent which provides an indication of the degree of contamination.
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 April 12, 1995 and granted January 14, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 12, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 12, 2017.
- 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.