A device for determining the characteristics of particles in suspension in a liquid
CA 2014388 C · Owner: Association De Gestion De L'Ecole Francaise De Papeterie Et De L'Imprime Rie · Inventors: Silvy, Jacques; Pascal, Rene
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for determining the characteristics of particles in suspension in a liquid, comprising means for injecting samples of particles; a fractionator (3) sorting those particles as a function of their length; an optical measurement cell (4) receiving the output of the fractionator, said optical measurement cell comprising means for sending a polarized coherent electromagnetic radiation through the flow of particles in suspension and for collecting the light diffracted in various directions; means (6) for calculating the values of the intensities and combinations of those values in the various directions of the optical radiation.
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 11, 1990 and granted July 3, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 11, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 11, 2012.
- 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.