Pyrazol-5-ones
CA 1048513 A · Owner: Bayer Aktiengesellschaft · Inventors: Horstmann, Harald; Moller, Eike; Meng, Karl
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PYRAZOL-5-ONES, Abstract of the Disclosure 1-Substituted pyrazol-5-ones of the formula and pharmaceutically acceptable, nontoxic salts thereof wherein, R is hydrogen or amino;, R1 is hydrogen alkyl, alkenyl, unsubstituted or sub-, stituted aryl or unsubstituted or substituted aralkyl; X is a) ethylene, ethylene wherein 1 hydrogen atom on one of the carbon atoms is substituted by alkyl of 1 to 4 carbon atoms, ethylene wherein 1 hydrogen atom on each of the two carbon atoms is substituted by alkyl of 1 to 4 carbon atoms or said ethylene which is linked to R2 via an oxygen or sulphur atom;, b) propenyl, propenyl wherein 1 hydrogen atom on one, two or three of the carbon atoms is substituted by …
Read the whole patent
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 February 13, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 13, 1996.
- 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.