Modification of an azine pigment
CA 1331612 C · Owner: Ciba-Geigy Ag · Inventors: Tanner, Martin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel modification of an azine pigment Azine pigment which has one of the possible tautomeric forms of the formula I, (I), and which is present in its c-crystalline modification which is charac-, terized by the interplanar spacings (relative intensity) 3.29 (100); 3.60 (24); 3.73 (20); 4.64 (28); 6.23 (31); 6.97 (23); 8.05 (67); 9.36 (34); 12.63 (67); 13.96 (32) and 16.35 (30). This pigment is excellently suitable for colouring high-molecular weight organic material, in particular automobile pants.
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 August 23, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 23, 2011.
- 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.