Method of reinforcing porous materials
CA 1075543 A · Owner: Asahi Fancy Plywood Co. · Inventors: Oka, Katsuhiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A board-like porous material is coated with a polymerizable monomer over its upper and lower surfaces and is thereby immediately impregnated with the monomer. The material is then placed into shallow containers. A specified number of the containers containing the material are stacked, a lid is placed over the uppermost container and the containers are hermetically closed by being held together by fastening means. The bottom wall of the container and the lid are each of a hollow structure and include a plurality of parallel partitions providing hot air passages arranged in parallel and having open front and rear ends. Finally hot air is supplied to the passages to heat the containers, …
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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
- Granted April 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 15, 1997.
- 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.