Photocurable imidizable polyene-polythiol compositions
CA 1092135 A · Owner: W. R. Grace Co. · Inventors: Mathias, Eckart
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to polyenes containing at least two ethylenically unsaturated bonds per molecule formed by reacting in substantially stoichiometric amounts, (1) a primary diamine, (2) a member of the group consisting of a benzenoid-containing dianhydride acid anhydride and anhydride acid halide and (3) an ethylenically unsaturated alcohol. The thus formed amideacid polyene either per se or after being cured in combination with a polythiol in the presence of a free radical generator will, upon heating, imidize.
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 December 23, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 23, 1997.
- 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.