Ethynylbenzene compounds and derivatives thereof
CA 1084521 A · Owner: William H. Rorer Inc. · Inventors: Diamond, Julius
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An ethynyl benzene compound of the formula which has analgesic and antipyretic activities is produced (a) by splitting off carbon dioxide from a propiolic acid of the formula, or (b) by subjecting a compound of the formula ' to a hydrogen-halide splitting off treatment. In the above formulae, R is alkyl, cycloalkyl, alkylcycloalkyl cycloalkanyl, aryl or substituted aryl in which the substituent is Y", and Y, Y' and Y" are hydrogen alkyl, halo, nitro, amino, acylamino, mono- and diloweralkylamino mercapto, acylthio, lower alkylthio, lower alkylsulfinyl lower alkylsulfonyl, hydroxy, lower alkoxy acyloxy, haloloweralkyl, cyano or acetyl with the proviso that, when R is phenyl at least one of …
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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 26, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 26, 1997.
- 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.