Hard-faced ceramic module and method of making the same
CA 2226474 C · Owner: Suey, Paul V. · Inventors: Suey, Paul V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hard-faced ceramic fiber module is formed by providing a ceramic fiber sheet that is folded upon itself to form a first surface having adjacent folds and intermediate valleys by impregnating the first surface with an aqueous colloidal silica suspension, covering said impregnated first surface with a layer of a mixture of ceramic fibers in an aqueous colloidal suspension compressing said layer, freezing said module and then heating the same to remove substantially all of the water.
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 January 7, 1998 and granted June 4, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 7, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 7, 2020.
- 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.