Expired Canadian patentCanada
Method for crystallizing methionine
CA 2127755 C · Owner: Rhone-Poulenc Nutrition Animale · Inventors: Leclaire, Daniel; Giraud, Jean
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention involves a process for crystallizing methionine through the addition of an aluminum salt of an organic acid
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 July 11, 1994 and granted July 14, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 11, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 11, 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.
FiledJuly 11, 1994
GrantedJuly 14, 1998
Term endedJuly 11, 2014
Patent numberCA 2127755 C
Classification (IPC)C07C323/58 +1 more
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.