Novel process for the preparation of cetrorelix lyophilisate
CA 2115943 C · Owner: Wichert, Burkhard · Inventors: Sauerbier, Dieter; Wichert, Burkhard; Reissmann, Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel lyophilisate and method of preparation as well as the use of the lyophilisate to treat female infertility and for gonad protection. A lyophilisate of a peptide with 3 - 15 amino acids and optionally one or several bulking agents is prepared by dissolving 1 part by weight of peptide in 100 - 10,000 parts by weight of acetic acid and then transferring to water the solution so obtained being lyophilized. Cetrorelix is preferred as the peptide.
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 18, 1994 and granted August 5, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 18, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 18, 2016.
- 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.