Property enhancement of polyamides by co-condensation with lightstabilizers
CA 2452302 A1 · Owner: Clariant Finance (Bvi) Limited · Inventors: Krohnke, Christoph; Malik, Jan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The instant invention relates to polyamides containing chemically bound UVabsorbers of the type oxanilide or benzylidene-malonate produced by cocondensation of the UV-absorbers with the prepolymeric compounds and to a process for the production of polyamides with improved mechanical properties wherein the prepolymeric compounds and the UV-absorbers are mixed prior to the condensation reaction and wherein the UV-absorbers are used in a concentration range of from 0.0001 to 5 % by weight, related to the prepolymeric compounds.The instant polyamides are especially suitable for the manufacture of fibres having improved mechanical 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 August 5, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 5, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 5, 2024.
- 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.