Calcium fluoride
CA 2370381 A1 · Owner: Tovey, Daniel Russell · Inventors: Spooner, Neil John Curwen; Tovey, Daniel Russell
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 a doped calcium fluoride and in particular to a calcium fluoride precipitate doped with Eu and to a method for producing such a phosphor. Conventionally techniques such as disclosed in "Ion-beam , induced white luminescence of calcium fluoride implanted with both Eu and Tb ions", Aono et al, Jpn. J. Appl. Phys. Vol.32 (1993) pp 3851-3853 Part 1, No. , 9A, September 1993 (Aono) produce Eu and Tb implanted calcium fluoride (CaF2). However, there are significant disadvantages associated with using the Aono technique such as the duration of manufacture and the quality of the resulting product. Therefore, an embodiment of the present invention provides a …
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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 17, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 17, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 17, 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.