Mouldings made from core/shell particles
CA 2474861 A1 · Owner: Ruhl, Tilmann · Inventors: Ruhl, Tilmann; Winkler, Holger
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to moulded bodies having an optical effect essentially , consisting of core-shell particles comprising a shell which forms a matrix and a core which is essentially solid and has an essentially monodisperse size distribution, the refractive index of the core material being different from that of the shell material. The invention is characterised in that at least one contrast material is stored in the matrix.
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 January 7, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 7, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 7, 2025.
- 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.