Chromium complex dyes, process for their manufacture and use thereof
CA 1088051 A · Owner: Ciba-Geigy Ag · Inventors: Beffa, Fabio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Chromium complex dyed of the formula (1), , wherein, X1 represents a halogen atom a C1 C5-alkyl group, a, C1-C2-alkoxy group a nitro group, a C2-C3-alkanoyl-, amino or C2-C3-alkoxycarbonylamino group Me? represents a cation, and, Ar represents the radical of an aromatic diazo component which carries one to three SO3H and/or COOH groups, preferably one to three SO3H groups or one SO3H and one COOH group, and is optionally further substituted by halogen, C1-C5-alkyl, C1-C2-alkoxy or nitro.
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 October 21, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 21, 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.