Vinylcyclohexane-based block copolymers
CA 2352289 A1 · Owner: Dujardin, Ralf · Inventors: Bruder, Friedrich-Karl; Douzinas, Konstadinos; Wege, Volker
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 block copolymers which are mainly based on vinylcyclohexane and to a method for producing the same. The block copolymers can be processed into shaped bodies by means of extrusion or injection moulding. The resulting shaped bodies are characterised by high thermostability, good mechanical characteristics high transparency in the , visible and near-ultraviolet spectrum particularly low birefraction and , absorption of water.
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 November 16, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 16, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 16, 2021.
- 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.