Method for anaerobic sludge digestion and a digester
CA 2529641 C · Owner: Ergalia · Inventors: Philip, Herve; Maunoir, Siegfried
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The inventive method consists in introducing a fresh sludge flux whose concentration in terms of dry material is less than 40 g/l into the upstream part of a digester (200) maintaining a thin sludge layer in said digester circulating essentially horizontally effluents above and across the sludge layer and in removing the effluents from the digester simultaneously with soluble products of sludge digestion. The cuvette (201) of the digester is divided into sections (218a-218d) by the transversal walls for the effluent flow which are provided with a communication opening (216) in the lower part thereof.
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 May 21, 2004 and granted May 15, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 21, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 21, 2026.
- 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.