Transparent thermoplastic moulding material consisting of esters of 2,3-difluoracrylic acid
CA 2050882 A1 · Owner: Theis, Jurgen · Inventors: Wieners, Gerhard; Heumuller, Rudolf; Herbrechtsmeier, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, Transparent thermoplastic molding compound made of 2,3difluoroacrylic acid esters, A thermoplastic molding compound consisting of units of 2,3-difluoroacrylic acid esters or their deuterated derivatives, or containing units of these esters is, distinguished by a high glass transition temperature and high transparency. It is therefore suitable for the manufacture of beam waveguides for long transmission distances and high continuous use temperatures.
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 April 12, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 12, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 12, 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.