Compounds
CA 2048767 A1 · Owner: Imperial Chemical Industries Plc · Inventors: Ridyard, Denis Robert Annesley
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Dd.35886, ABSTRACT, Compounds, A water-soluble compound of Formula (1) which is useful for coloring e.g. cellulosic materials, animal furs and animal skins such as leather. (1), wherein:, A is optionally substituted phenylene or naphthylene; X is a cellulose-reactive group;, X1 is H or a cellulose-reactive group; p is greater than or equal to 1;, T1 and T2 are each independently selected from H CN, CO2R2, CONR2R3, COR2, alkyl, aralkyl cycloalkyl, aryl or a heterocyclic, radical which are unsubstituted or substituted; Z is a divalent linking group containing from 2 to 6 carbon atoms;, n is from 2 to 6;, R1 is H or sulpho; and R2 and R3 are each independently H or C1-6-alkyl; and salts …
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
- Filed August 8, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 8, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 8, 2013.
- 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.