Method of coating ceramic honeycomb members with finely-divided solids
CA 2036823 C · Owner: Birtigh, Gerhard · Inventors: Baumgartner, Wilfried; Birtigh, Gerhard; Dittrich, Ewald
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for uniformly coating a ceramic or metal honeycomb member with a quantity of solid from an aqueous coating dispersion, the quantity, at a given constant density of coating dispersion, being below the quantity which would be deposited at equilibrium between the honeycomb member and the coating dispersion. The honeycomb member is inserted into a vertical similarly-shaped immersion chamber having at least one inflatable seal. The immersion chamber is sealed and the coating dispersion is pumped into the honeycomb member from below within a charging time of less than 10 seconds and until charging is complete. The dispersion is pumped out after a holding time and within a pumping-out …
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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 February 21, 1991 and granted May 25, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 21, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 21, 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.