Stable modification of a disazo dyestuff
CA 1065308 A · Owner: Hoechst Aktiengesellschaft · Inventors: Opitz, Konrad; Hahnle, Reinhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the disclosure:, The modification ? being stable under dyeing conditions of the dyestuff of the formula, characterized by an X-ray diffraction diagram with the characteristic reflexes at the following glance angles a (Figure 3): angle 0 4.0° 5.0° 8.15° 12.7° 13.5°, intensity 0.31 0.38 1.00 0.92 0.63 said modification allowing dyeings being fast to rubbing obtained on textile wound packages of synthetic and semi-synthetic fibrous materials.
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 30, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 30, 1996.
- 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.