Discontinuous polyethylene terephthalate fibres and method for producing the same
CA 2378747 A1 · Owner: Wandel, Dietmar · Inventors: Cordes, Ingo; Kellner, Christian; Wandel, Dietmar
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates discontinuous polyethylene terephthalate fibres characterised by a new combination of properties. The association of new stress-elongation and modulus properties enables the production of discontinuous fibres, textiles or household fabrics having very high aesthetic qualities and utility values. The invention also relates to an economical method in two steps for producing said discontinuous polyethylene terephthalate fibres. Fusion spinning is carried out at a high polymer flowrate and at a running speed of at least 600 m/min. The drawing thermal , setting, creping and drying steps are carried out on a separate drawing bench.
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 20, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 20, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 20, 2022.
- 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.