Imidazolides
CA 1185249 A · Owner: Ciba Specialty Chemicals Holding Inc. · Inventors: Lohse, Friedrich; Moser, Roland; Zondler, Helmut
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel imidazolides (N-acylimidazoles) of the formula I (I), wherein, R1 is hydrogen, C1-C12-alkyl or phenyl and R2 is, hydrogen, or, R1 is ethyl, and R2 is methyl or, R1 is hydrogen, and R2 is phenyl or methyl and, R3 is a group of any one of the formulae II - VI (Il) (III) (IV) (V) (VI), wherein X1 is hydrogen chlorine or N02, and X2 is, hydrogen or N02. The imidazolides are suitable as curing agents for polyepoxide 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 April 9, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 9, 2002.
- 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.