Biodegradable binding agents for dyeing
CA 2305677 A1 · Owner: Bayer Aktiengesellschaft · Inventors: Donkels, Norbert; Meyer, Josef; Pirkotsch, Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Certain anionic polyurethanes are excellently suited for use as binding agents for coating, dyeing and printing textiles and leather. Said polyurethanes are biodegradable. The residual and wash liquors left over from the dyeing process can therefore be conveyed to a biological effluent treatment plant.
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 September 18, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 18, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 18, 2020.
- 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.