Preparation of a novel diisocyanate from norbornadiene
CA 1297490 C · Owner: Alexanian, Vazken Arsen · Inventors: Alexanian, Vazken Arsen; Nummy, Laurence John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel bicyclic alkyl dicarbamates are prepared from norbornadiene and other simple starting materials and these, are subsequently thermally cracked to novel diisocyanate norbornyl derivatives, which are, among others useful for, crosslinking active hydrogen compounds.
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 March 17, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 17, 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.