Process for the production of n-methylcarbamates
CA 1249594 A · Owner: Enichem Sintesi S.P.A. · Inventors: Garone, Guido; Romano, Ugo; Mizia, Franco
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PROCESS FOR THE PRODUCTION OF N-METHYLCARBAMATES" ABSTRACT OF THE DISCLOSURE, Process for the production of N-methylcarbamates: (I), (wherein RO- is the radical of a substituted phenol or of a naphthol), wherein: in a first reaction step methylamine and diphenyl carbonate are reacted with each other operating in the liquid phase and as a continuous process in order to form phenol and phenyl-N-methylurethane; in a second reaction step phenyl-N-methylurethane within the, related reaction mixture outcoming from the first step is, thermally continuously decomposed, to yield a gaseous stream containing methyl isocyanate, from which the components different to methyl isocyanate are condensed off; …
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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 January 31, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 31, 2006.
- 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.