Process for the combined treatment of waste materials
CA 2080471 C · Owner: Bouman, Johannes · Inventors: Quaak, Marinus Pieter; Bouman, Johannes
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for the combined treatment of waste materials of two types A and B A being waste, material having a relatively high energy content and B being a water containing waste material having a relatively low energy content said process comprising the following steps: 1) pyrolyzing (2) material A to produce a gas and/or oil (4) and a carbonaceous residue (3), 2) mixing (11) said carbonaceous residue with B to form a water containing mixture C 3) shaping (12) said mixture C, into individual pieces 4) drying and baking (13) said pieces to ceramic bodies (15) wherein in step 2, the carbonaceous residue (3) is used in such an amount that less than about 80 % of the …
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, 1991 and granted July 28, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 11, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 11, 2013.
- 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.