5-amino-2-substituted phenyl 2-hydroxyethyl sulphone intermediates for dyestuffs
CA 1251466 A · Owner: Bayer Aktiengesellschaft · Inventors: Herd, Karl J.; Harms, Wolfgang; Jager, Horst
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to an amino compound of the general formula V, (V), wherein, X is NR3, O or S; R3 is H, C1-C4-alkyl, C1-C4-alkyl substituted by SO3H OSO3H, COOH, OH or OCH3; and, Y is C2-C6-alkylene C2-C6-alkylene substituted or inter-, rupted in the alkylene chain by OSO3H O, SO2, NH, S or -NCH3. These compounds of formula V are useful as intermediates in preparing triphendioxazine dyestuffs.
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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 March 21, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 21, 2006.
- 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.