Laundry treatment compositions comprising an anthraquinone hydrophobic dye
CA 2575592 C · Owner: Batchelor, Stephen Norman · Inventors: Batchelor, Stephen Norman; Bird, Jayne Michelle
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a laundry treatment composition comprising a hydrophobic dye having an , anthraquinone structure and surfactant. A method of treating a textile with said composition is also claimed. The anthraquinone structure is: (see formula I), wherein R1, R4, R5, and R8 are independently selected from the groups consisting of -H, -OH, -NH2 and -NO2, such , that a maximum of only one -NO2 group and a maximum of two -H are present as R1, R4, R5, and R8 substituents; and R2, R3, R6, and R7 is selected from -H F, Br, Cl or , -NO2, and -Oaryl. The compositions enhance the apparent whiteness of polyester comprising garments.
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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 September 12, 2005 and granted November 12, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 12, 2025.
- 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
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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.