1-phenoxy-2-propanol as a formulating aid for dyes
CA 2607985 C · Owner: Basf Specialty Chemicals Holding Gmbh · Inventors: Kaeser, Adolf; Lautenbach, Holger
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 aqueous dye solution comprising a) 5 to 30% by weight of an anionic or cationic direct dye b) 0.1 to 10% by weight of 1-, phenoxy-2-propanol c) 0 to 20% by weight of an inorganic or an organic acid d) 0 to 20% by weight of further additives and e) water to complete to 100% a , process for the preparation of the solution and the use thereof for dyeing paper.
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 May 8, 2006 and granted November 5, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 8, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.