Fiber-reinforced heat-resistant sound-absorbing material and process for producing the same
CA 2561737 C · Owner: Sato, Mitsuhiko · Inventors: Sato, Mitsuhiko; Miyamoto, Norifumi; Oishi, Tsutomu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A production process which comprises, a preform formation step of forming a fiber preform made of silicon carbide short fibers having heat resistance of 1000°C or greater; a sol-gel preparation step of preparing a sol-gel solution containing a heat resistant compound having heat resistance of 1000°C or greater; an impregnation-drying-calcination step of impregnating the fiber preform with the sol-gel solution followed by drying , and calcining; and a crystallization step of crystallizing the fiber preform after impregnation, drying and calcination.
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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 17, 2005 and granted May 29, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 17, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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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.