Silicon carbide fibers having a high strength and a method for producing said fibers
CA 1107926 A · Owner: The Research Institute For Iron, Steel And Other Metals Of The Tohoku Un Iversity · Inventors: Omori, Mamoru; Hayashi, Josaburo; Yajima, Seishi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for producing a silicon carbide fiber having a high tensile strength which comprises (1) preparing a spinning solution from at least one organosilicon high molecular weight compound having a softening point of higher than 50°C, in which silicon and carbon are the main skeleton components, and spinning said spinning solution into a fiber, (2) preliminarily heating the spun fiber at a temperature of 350°-800°C under vacuum or a non-oxidizing atmosphere to volatilize low molecular weight compound contained therein and, (3) baking the thus treated fiber at a temperature of 800°-2,000°C under vacuum or at least one non-oxidizing atmosphere selected from the group consisting of an inert …
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
- Granted September 1, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 1, 1998.
- 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.