Anti-stokes fluorescent material composition
CA 2443847 A1 · Owner: Bley, Bianca · Inventors: Fischbeck, Uwe; Bley, Bianca
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to anti-Stokes fluorescent material compositions which upon excitation by IR radiation, for their part emit IR radiation without significant quantities of visible blue light being emitted at the same time and which are therefore suitable as invisible security marks.
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 December 13, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 13, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 13, 2024.
- 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.