Process for manufacturing a ceramic foam body
CA 2022767 A1 · Owner: Fischer, Anton · Inventors: Kaser, Peter; Fischer, Anton; Eckert, Karl-Ludwig
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The process for manufacturing an open pore foam body (10) with three dimensional ceramic network (24) in particular as a, filter for the treatment of hot gases or as a catalyst substrate, has as its starting material a block of open pore plastic foam (36). This is impregnated at least once with a ceramic suspension, freed of excess ceramic suspension and heated to a temperature below the melting point of the plastic, then finally burnt off at a temperature at which the ceramic sinters together. The plastic foam block (36,28,38,44,46) of the prescribed outer dimensions is cooled down and machined to produce a Z-flow filter with high precision longitudinal channels (14,20,32,40,42).
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 August 7, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 7, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 7, 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.