Coating agent for carbonization chamber of coke ovens and application method thereof
CA 2249285 C · Owner: Taiho Industries Co. Ltd. · Inventors: Kasaoka, Shizuki; Nakai, Shigeru; Ando, Takeshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a coating layer of the coke oven having a high strength, high impact resistance and excellent smoothness to enable long term protection of the fire brick of the coke oven. Carbon adhered to the brick can be removed by spraying a coating agent with a glaze layer mainly composed of 18 to 70% by weight of SiO2 and 10 to 60% by weight of Na2O and/or K2O and containing one or a plurality of 2 to 14% by weight of P2O5, 0.5 to 25% by weight of BaO 0.5 to 25% by weight of SrO and 0.5 to 20% by weight of Fe2O3 onto the surface of a high temperature firebrick thereby obtaining an excellent coating layer.
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 February 4, 1998 and granted May 7, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 4, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 4, 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.