Filter material for filtering out soot particles
CA 2028283 A1 · Owner: Eckert, Karl-Ludwig · Inventors: Mizrah, Tiberiu; Eckert, Karl-Ludwig; Gabathuler, Jean Pierre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The filter material with a three dimensional open pore, network type of structure for filtering soot particles out of hot gases is comprised of fibres or a framework (18) that is resistant to high temperatures and can be electrostatically charged. The network type of structure is in the form of foam porous, sintered bodies, fibre webbing knitted fibres, fibre meshes, fibre felts or loose fibre strings. It is made up of electrically conductive fibres, electrically non-conductive fibres with an electrically conductive coating (20) an, electrically conductive framework (18) or a framework (18) of electrically non-conductive ceramic with an electrically conductive coating (20). An electrically …
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 October 23, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 23, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 23, 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.