Thermotropic aromatic polyester(amide) monofilament
CA 2292753 A1 · Owner: Aubry, Jean-Claude · Inventors: Esnault, Philippe; Aubry, Jean-Claude
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a thermotropic aromatic polyester(amide) as-spun monofilament verifying the following relationships: D ? 40; Te > 45; .DELTA.L ? 0 D being its diameter (in µm), Te its toughness (in cN/tex) and .DELTA.L being its variation in length (in %) after 2 minutes at 235 ± 5 ·C under prestress of 0.2 cN/tex. The invention also concerns the spinning method for obtaining such a monofilament consisting in particular, at the die outlet in structuring the polymer flow by drawing it in a gas fluid layer for a predetermined duration which is a function of the diameter D before the resulting structured polymer flow is hot-dipped in a liquid for its solidification.
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 5, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 5, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 5, 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.