Method of manufacturing a sandwich panel and a sandwich panel as such
CA 2594952 C · Owner: De Groot, Martin Theodoor · Inventors: De Groot, Martin Theodoor
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method of manufacturing a sandwich panel (10) . Such a sandwich panel consists of a foamed core layer (12) and at least one thermoplastic cover layer (14) . The sandwich panel is made by in situ foaming. In a first assembling step a core web comprising at least one sheet , of a thermoplastic material (12) containing an amount of a suitable physical blowing agent is positioned between two cover layers (14) . The assembly of core web and cover layers is arranged between two press plates. Due to heat and pressure applied in a subsequent foaming step foaming of the core web and , effective bonding thereof to the cover layers is achieved. Subsequently the foamed …
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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 January 24, 2006 and granted June 3, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 24, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.