Centrally-acting muscle relaxants
CA 1291041 C · Owner: Iwata, Nobuyoshi · Inventors: Hara, Takao; Iwata, Nobuyoshi; Tonohiro, Toshiyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Isoxazolin-3-one derivatives represented by the general formula, (I), in which, R1 represents a hydrogen atom or a halogen atom; R2 represents a lower alkyl group an aryl group, or a heterocyclic group; or R1 and R2 together, with the adjacent carbon atoms form a hydrocarbon ring;, R3 represents a hydrogen atom or a lower alkyl group; R4 represents a lower alkyl group; or R3 and R4 together with the adjacent nitrogen atom may form an, alicyclic amino group. and their pharmaceutically acceptable acid addition salts are useful as centrallyacting muscle relaxants.
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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 October 22, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 22, 2008.
- 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.