Stable isopropenyl acetophenone solutions
CA 1304752 C · Owner: Jujo, Yozo · Inventors: Jujo, Yozo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In accordance with the present invention there, are obtained stable isopropenyl acetophenone solutions containing (i) an organic carboxylic acid and/or (ii) a specific diluent and, if necessary, (iii) a radical polymerization inhibitor. Because of such composition as mentioned above, the present isopropenyl acetophenone solutions are quite useful and excellent in stability especially long-term preservation performance showing, practically no polymerization of the isopropenyl acetophenone contained therein even when the solutions are preserved for an extended period of time under the circumstances of high temperature.
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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 7, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 7, 2009.
- 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.