Phenylacetic acid derivatives
CA 1320723 C · Owner: Sauter, Robert · Inventors: Sauter, Robert; Hurnaus, Rudolf; Grell, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
27169-119, Abstract, Phenylacetic acid derivatives The invention relates to compounds of formula I (I), (wherein R1 represents a 5- to 7-membered saturated nitrogencontaining heterocyclic ring, which ring is attached via the nitrogen atom to the benzene ring, the heterocyclic ring being optionally substituted by one or two alkyl groups each having 1 to 3 carbon atoms;, R2 represents a hydrogen or halogen atom or a methyl or methoxy group;, R4 represents a hydrogen atom an alkyl group with 1 to 3, carbon atoms or an ally. group; and R3 represents a hydrogen atom, an alkyl group with 1 to 7 carbon atoms, a phenyl group optionally substituted by a halogen atom or a methyl or methoxy group, an …
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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 July 27, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 27, 2010.
- 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.