Process for the manufacture of a stain resistant melt colored carpet
CA 2125112 C · Owner: Basf Corporation · Inventors: Armen, Ardy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the manufacture of a stain resistant melt colored carpet by melt mixing a polyamide copolymer containing sulfonate, groups with a coloring agent to form a homogeneous polymer melt into fibers, tufting the fibers in a backing to form a carpet treating the carpet with polymethacrylic acid copolymers of, polymethacrylic acid, a mixture of polymethacrylic acid and a sulfonated aromatic formaldehyde condensation product and a, reaction product of the polymerization or copolymerization of methacrylic acid in the presence of a sulfonated aromatic formaldehyde condensation product.
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 3, 1994 and granted April 6, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 3, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 3, 2016.
- 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.