Layered composite material comprising various pre-hardened resin layers
CA 2423191 A1 · Owner: Basell Polyolefine Gmbh · Inventors: Muller, Klaus; Klemm, Klaus
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 layered composite material containing a support made of a thermoplastic polymer, an intermediate layer which is arranged on the support and also made of a thermoplastic polymer and a heat hardened , layer which is disposed on the intermediate layer. The invention is characterised in that another resin layer (a) with a hardening degree of at least 20 % is inserted between the support and the intermediate layer and a resin layer (c) with a hardening degree of at least 60 % is inserted between the intermediate layer and the heat hardened layer.
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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 September 18, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 18, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 18, 2023.
- 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.