Pyrazol-1-yl-phenylacetic acids, and processes for their preparation
CA 1097661 A · Owner: Byk Gulden Lomberg Chemische Fabrik G.M.B.H. · Inventors: Rainer, Georg
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The subject matter of the invention is pyrazol-1-ylphenylacetic acids of the general formula I (I), wherein, R1, R2 and R3 are the same or different and denote a hydrogen atom or a halogen atom, R4 denotes a hydrogen atom or an alkyl group A ???? B denotes a carbon - carbon single or double bond their salts and their functional carboxylic acid derivatives as well as processes for their preparation and medicaments containing them. - 1 -
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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
- Granted March 17, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 17, 1998.
- 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.