Indan derivatives and process for preparation thereof
CA 1331462 C · Owner: Ikezawa, Katsuo · Inventors: Odawara, Akio; Ikezawa, Katsuo; Kohno, Harumichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract:, Indan derivatives of the formula: (I), wherein R1 is substituted or unsubstituted phenyl naphthyl, or sulfur-containing heterocyclic group and R2 is hydroxy-, methyl or a group of the formula: wherein R3 is a, hydrogen atom or lower alkyl and R4 is cycloalkyl lower, alkoxycarbonyl-phenyl, carboxy-phenyl nitrogen-containing, heterocyclic group lower alkyl, or lower alkyl having a, substituent selected from lower alkoxycarbonyl carboxy, lower alkoxycarbonyl-phenyl, carboxy-phenyl lower alkoxy-, carbonyl-cycloalkyl and carboxy-cycloalkyl or a pharma-, ceutically acceptable salt thereof which are useful as, platelet aggregation-inhibiting agents and as agents for the treatment, …
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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 August 16, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 16, 2011.
- 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
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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.