Sandwich panel material and a method of providing a local reinforcement in a sandwich structure
CA 2010043 C · Owner: Brambach, Johan Arie · Inventors: Brambach, Johan Arie
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is directed to a sheet-like sandwich material provided with a local reinforcement comprising, a core material sandwiched between two reinforced top layers, which core material is a thermoplastic foamed, core material or a core material having a honeycomb structure and which top layers consist of a thermoplastic synthetic plastics material reinforced with fibres preferably in, the form of a woven fabric a knitted fabric, a fibrous, web, or unidirectionally applied fibres and at least, one local reinforcement consisting of an amount of plastic material injected under pressure into the core material through one of the top layers, and which plastic material has hardened after …
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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 February 14, 1990 and granted January 30, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 14, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 14, 2012.
- 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.