Bis-(4-isocyanatophenoxy)-alkanes and a process for the production thereof
CA 1234833 A · Owner: Bayer Aktiengesellschaft · Inventors: Konig, Klaus; Heitkamper, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Mo-2713, LeA 23,438, BIS-(4-ISOCYANATOPHENOXY)-ALKANES AND A PROCESS FOR THE PRODUCTION THEREOF, ABSTRACT OF THE DISCLOSURE Bis-(4-isocyanatophenoxy)-alkanes corresponding to the formula, in which, R represents a divalent saturated aliphatic, hydrocarbon radical having from 2 to 6 carbon atoms with at least two carbon atoms between the two ether oxygen atoms, and, R' represents hydrogen or a methyl group with R' being the same on both rings, are produced by phosgenating the corresponding diamine or an adduct of the corresponding diamine. These diisocyanates are particularly useful in the production of isocyanate addition products having outstanding physical and mechanical properties. Mo-2713
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 April 5, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 5, 2005.
- 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.