Black synthetic fibre
CA 2022096 A1 · Owner: Du Pont Canada Inc. · Inventors: Hamilton, Michael Andrew; Palilionis, John Algis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A polyamide composition for use in making high strength black nylon 6,6 fibre. The composition comprises of nylon 6,6 polymer; at least 0.4 wt% of carbon black based on the weight of the composition: in the range of about 0.006 to 0.1 wt% based on the weight of the composition of an organic pigment having a mean particle size in the range of about 0.05 to 0.2 microns the pigment, being heat stable at the melting point of the nylon and being insoluble in the nylon. The components (a) (b) and (c) are blended together at a temperature at or above the melting point of the polymer to provide an even dispersion of (b) and (c) in (a).
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 July 27, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 27, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 27, 2012.
- 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.