Composition for dyeing material of synthetic aromatic polyamide fibers comprising a cationic dye
CA 2428758 A1 · Owner: Haith, Malcolm S. · Inventors: Guthrie, Darrin Mcbane; Haith, Malcolm S.; Greeson, Harold Kenneth Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition for dyeing material of synthetic aromatic polyamide fibers, said composition containing a mixture of (a) a cationic dye and (b) a cyclohexenone as a dye assistant. Preferably 2-cyclohexen-1-one,3,5,5-, trimethyl is the dye assistant.
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 15, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 15, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 15, 2025.
- 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.