Imidyl-benzenedicarboxylic acid derivatives
CA 1069124 A · Owner: Ciba-Geigy Ag · Inventors: Greber, Gerd; Roth, Martin; Kvita, Vratislav
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
New imidyl-benzenedicarboxylic acid derivatives of formula Ia and Ib, or , (Ia) (Ib) , wherein A denotes a radical of the formula , , , or , R1 and R2 independently of, one another denote hydrogen chlorine or bromine and R3, denotes a chlorine atom a hydroxyl group, an unsub-, stituted or substituted phenoxy group an alkoxy group, with 1 to 18 carbon atoms or a -O-M+ group in which M+, represents an alkali metal cation a trialkylammonium ca-, tion with 3-24 carbon atoms or a quaternary ammonium cation and a process for their manufacture are described These imidyl-benzenedicarboxylic acid derivatives are suitable for the manufacture of cross-linkable polymers above, all polycondensation and …
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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 1, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 1, 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.