Method and apparatus for contacting solid particles and fluid
CA 2062945 C · Owner: Exxon Research And Engineering Company · Inventors: Holmes, Philip
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus are described for contacting solid particles and fluid. A liquid is sprayed as liquid droplets from the discharge tip of a nozzle (50) into hot solid particles passing upwardly; in a vertical pipe (23). A venturi is formed in the pipe, and the venturi has an enhance portion which is upwardly convergent to the throat and an exit portion which is up- wardly divergent from the throat. The tip of the nozzle (50) is so located relative to the venturi that liquid droplets commence vaporization, due to heat transfer from the hot solid particles no, further upstream (relative to the direction of movement of solid particles up the pipe (23)) then the throat of the venturi …
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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 July 11, 1990 and granted April 2, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 11, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 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.