PROCESS FOR PREPARING .omega.-LACTAMS, IN PARTICULAR CAPROLACTAM
CA 1138447 A · Owner: Snia Viscosa Societa Nazionale Industria Applicazioni Viscosa S.P.A. · Inventors: Rossi, Pier P.; Catoni, Mario
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process for the preparation of .omega.-lactams (in particular caprolactam) with improved yields by reaction, of cycloaliphatic derivatives having the general formula wherein n = 3 - 13, with nitrosating agents in the presence of the dehydrating agents, characterized by the fact that the reaction is carried out a low temperature which is constant between stages and in all the zones of a stage and with particular concentrations of the dehydrating agent.
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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 December 28, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 28, 1999.
- 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.