Lyophilized bioluminescent bacterial reagent for the detection of toxicants
CA 2200702 C · Owner: E.I. Du Pont De Nemours And Company · Inventors: Wagner, Lorraine Winona; Van Dyk, Tina Kangas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A reagent, useful in the detection of environmental insults comprising bacterial cells containing a stress promoter operably linked to a lux gene complex has been prepared by lyophilizing the cells in a specified medium. The reagent may be used immediately upon rehydration where a positive test for the presence of an environmental insult is given by an increase in light production from the cells.
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 November 20, 1995 and granted December 5, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 20, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 20, 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.