2,3-alkylene bis(oxy)benzoic acids
CA 1137472 A · Owner: Societe D'Etudes Scientifiques Et Industrielles De L'Ile-De-France · Inventors: Bulteau, Gerard; Acher, Jacques; Collignon, Claude
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to novel 2,3-alkylene bis(oxy)benzoic acids of the formula:, I, wherein A represents a C1-3 alkylene chain which may or may, not be substituted by a C1-4 alkyl a C2-4 alkenyl or a C1-4, hydroxyalkyl group; X represents hydrogen a halogen atom, hydroxy, amino, a substituted amino a C1-4 alkoxy or a C1-4, alkyl group; Y represents hydrogen a halogen atom, hydroxy, amino, a substituted amino nitro, a C1-4 alkoxy, C1-4 alkyl-, sulfonyl adamantylsulfonyl, a cycloalkylsulfonyl a sulfonyl, group substituted by an amino mono- or disubstituted NR3R4, amino group in which R3 and R4 which can be the same or different are: hydrogen atoms, or groups C1-4 alkyl C2-4, alkenyl, C2-4 …
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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 December 14, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 14, 1999.
- 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.