New insoluble derivatives of s-triazine, their preparation process, compounds containing them and their uses
CA 2197346 C · Owner: Richard, Herve · Inventors: Lagrange, Alain; Richard, Herve; Leduc, Madeleine
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
his invention deals with new insoluble derivatives of s-triazine with benzalmalonate and/or phenylcyanoacrylate groups their preparation process and uses in particular forms as UV filters particularly in the cosmetics industry. Application of these compounds in particular, to skin and hair protection against ultraviolet radiation.
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 February 11, 1997 and granted October 31, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 11, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 11, 2019.
- 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.