Thermoplastic multilayer composites
CA 2114517 C · Owner: Degussa-Huls Aktiengesellschaft · Inventors: Rober, Stefan; Jadamus, Hans
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A thermoplastic multilayer composite is disclosed. The composite comprises at least one layer based on a moulding compound of polyamide and at least one layer based on a moulding compound comprising a mixture of polyvinylidene fluoride and polyglutarimide. The layers are adhesively bonded to one another. The multilayer composite of the invention has an outstanding resistance to and barrier action against diffusion of chemicals solvents and fuels. Since the layers are adhesively bonded to one another, no delamination of the layers occurs on thermal expansion or flexing of the finished part. The composite can be used in structural parts, particularly in electrical engineering, and automobile …
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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 28, 1994 and granted August 17, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 28, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 28, 2016.
- 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.