Method for treating fabric with viscous liquid polymers
CA 2618049 C · Owner: E. I. Du Pont De Nemours And Company · Inventors: Chiou, Minshon J.; Trentacosta, Joseph D.; Samant, Kalika Ranjan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
A process of treating a woven fabric by applying to the fabric a viscous polymer in a 5 to 40 wt% solution with a solvent wherein the polymer has a T9 , in the range of about minus 40 to about 0~C and a zero shear melt viscosity of about 2 x 106 to about 1013 poise when measured at 2O~C and then evaporating the solvent such that the polymer only partially penetrates the fabric and penetrates to in and between fiber bundles before the polymer solidifies.
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.
Why it's free to use
- Filed June 21, 2006 and granted December 30, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 21, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.