Polymers capable of being cross-linked by light and process for their preparation
CA 1047197 A · Owner: Hoechst Aktiengesellschaft · Inventors: Steppan, Hartmut; Buhr, Gerhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Polymers capable of being cross-linked by light which, comprise units having lateral substituted 1-carbonyloxy-1H-naphthalene-2-one groups of the formula, where R is hydrogen or methyl; R1 is a straight-chain or branched saturated or unsaturated hydrocarbon radical having from 1 to 3 carbon atoms, in which a hydrogen atom may be substituted by cyano (C1 to C2) alkoxy, carbo-(C1 to C2)-alkoxy (C1 to C2)acyl or (C1 to, C2)acyloxy and R2 and R3 independently, each are hydrogen (C1 to C4)alkyl or chlorine; and R4 is hydrogen (C1 to C4)alkyl, nitro, chlorine or bromine are provided.
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 23, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 23, 1996.
- 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.