Polycondensates as dyeing promoters for hydrophobic polymer articles
CA 2529609 C · Owner: Leggio, Andrew Joseph · Inventors: Dong, Ying; Suhadolnik, Joseph; Mcnamara, John James
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for dyeing or printing an article comprising a hydrophobic polymer wherein said polymer is brought into contact with a condensation polymer obtained by condensation of at least one poly-hydroxyl-mono-carboxylic acid prior to or simultaneously with the treatment of said article with a color imparting compound, with the proviso that the condensation polymer is not terminated with lipophilic groups, provides dyed articles with good fastness properties.
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 June 30, 2004 and granted May 29, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 30, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 30, 2026.
- 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.