Optimised method for the treatment and energetic upgrading of urban and industrial sludge purifying plants
CA 2254724 C · Owner: Bouchalat, Youssef · Inventors: Bouchalat, Youssef
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns an optimised method for the treatment and energetic upgrading of urban and industrial sludge purifying plants. It consists of a "novel" combination of known and tested equipment forming a compact assembly with six functions which are: anaerobic sludge digestion (1) and biogas production mechanical dehydration (2) up to 22-24 % of dry matter a gas turbine installation (3) burning the biogas into "total energy" thermal drying (4) of the sludge up to 92 % of dry matter consisting of a thin-layer drier and a vibrated drier/cooler with fluid bed (4b) condensation of the vapours (5) for heating the digester and the premises and optimised energetic upgrading (6) of the dried …
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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 October 13, 1997 and granted October 29, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 13, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 13, 2019.
- 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.