Method and machine for extracting, by evaporation, solid residues contained in a fluid matter
CA 2361236 A1 · Owner: Sirven · Inventors: Bourdel, Jacques
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a method which consists in spreading the matter to be treated in the form of a thin layer on the smooth hot surface (10) of a heat exchanger (1) wall mobile along a closed cyclical trajectory; in pressing the layer of matter against said surface to make it level and promote its spreading; and in recuperating at the end of the cycle the dry solid residues. The method is characterised in that just before spreading, it comprises a step which consists in considerably expanding in volume the matter (M) so as to provide it with a foam-like consistency such that it is said foam which is spread in the form of a thin layer on the hot surface (10). The invention is useful for …
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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 December 24, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 24, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 24, 2021.
- 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.