Yellow bismuth phosphovanadate and/or siliconvanadate-based pigments, and methods for preparing same
CA 2076371 A1 · Owner: Buyse, Emile Joseph · Inventors: Buyse, Emile Joseph; Vermoortele, Frank
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Yellow bismuth vanadate-based mineral pigments having the following chemical formula: Bia Lb Mc Nd O4 wherein L is Si, or simultaneously Si and one or more elements chosen from Ti Ge, or Zr, or simultaneously Si and one or more elements chosen from Ti, Ge or Zr and one or more elements chosen from group IIIa: M is V or simultaneously V and an element chosen from group Vb N is Mo or W a varies between 1 and 4/3 and b c and d vary, between 0 and 1, with the proviso that c is greater than 0.
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 17, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 17, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 17, 2013.
- 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.