1-alkyl-2-aminomethyl-aminocyclohexane and/or 1-alkyl- 4-aminomethyl-aminocyclohexane
CA 1248552 A · Owner: Basf Aktiengesellschaft · Inventors: Hahn, Erwin; Neumann, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention describes novel diamines of formulae:, in which R is an alkyl radical having from 1 to 12 carbon atoms. The diamines of this invention are useful for the preparation of their corresponding diisocyanates for example, via phosgenation and subsequent thermal cleavage of the intermediately formed carbamic chloride. The diisocyanates are used for the preparation of plastics preferably, polyurethanes, and crop protection agents.
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 January 10, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 10, 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.