Stable adhesive composite material made of polyurethane and of another thermoplastic material, a process for its production and a method for its use in motor vehicles
CA 2308997 A1 · Owner: Wegener, Dirk · Inventors: Heitkamper, Peter; Schmidt, Manfred; Warth, Holger
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to composite materials made of at least one composite, layer of a polyurethane and of a second composite layer which is directly bonded to the, first layer and which consists of a thermoplastic material that is different from the, polyurethane of layer A). The polyurethane material of layer A) is characterized by a, residual content of free reaction components containing ether groups of no more than, 400 ppm, and preferably of no more than 100 ppm. The invention also relates to a , process for the production of these composite materials and to a method of their use as, materials in motor vehicles.
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 May 19, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 19, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 19, 2022.
- 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.