Laminate of phenolic resin foam
CA 2318420 C · Owner: Asahi Kasei Kogyo Kabushiki Kaisha · Inventors: Watanabe, Takayasu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Provided is a laminate of a phenolic resin foam which is reduced in oozing of the phenolic resin to the outside surface and in discoloration-induced spots on the laminate and is excellent in product quality and adhesion strength of the face material; a process for producing the laminate; and a construction method of the laminate. The present invention relates to a laminate comprising a phenolic resin foam and a nonwoven fabric of synthetic fibers bonded to one or both sides of the phenolic resin foam without using an adhesive layer. As the nonwoven fabric, that having a fiber fineness of 3 deniers or finer and a basis weight of 15 g/m2 or greater is employed.
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 6, 1999 and granted December 31, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 6, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 6, 2021.
- 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.