Stampable sheet shaped-product, process for producing the same, and use of the same as sound-absorbing and heat-insulating material
CA 2057616 C · Owner: Imashiro, Yasuo · Inventors: Matsumoto, Takahiko; Imashiro, Yasuo; Morimoto, Kiyotake
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A stampable sheet shaped-product has a skin layer consisting essentially of a foamable thermosetting resin and formed on and in one or both of surfaces of a sheet-like open cell plastic foam. Optionally a facing material layer of a proper material may be formed on one or both of surfaces of the skin layer. Such stampable sheet shaped-product is produced by applying a composition consisting essentially of a foamable thermosetting resin onto one or both of surfaces of a sheet-like open cell plastic foam so, that the one or both surfaces is or are impregnated with the composition. Optionally, placing a proper facing material on one or both of the surfaces, and subjecting the resulting material …
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 December 13, 1991 and granted May 28, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 13, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 13, 2013.
- 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.