Method for spin stretching of polymers
CA 2394958 A1 · Owner: Meister, Olaf · Inventors: Meister, Olaf; Ruf, Eberhard; Zang, Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for simultaneously spin stretching one or more heavy-duty yarns involving the following steps: a) a polymer melt is fed to a spinning device; b) the melt is extruded through a spin nozzle (5) having several extruding openings while producing fibers (6); c) the fibers (6) are lead through a cooling zone (7); d) the fibers are guided through a drop shaft (8); e) the fibers (6) are tensioned between a delivery galette (10) and a first stretching galette; f) the fibers are then stretched between the first stretching galette (11) and a second stretching galette; g) the fibers (6) are relaxed between the second stretching galette (12) and a relaxing …
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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 December 9, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 9, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 9, 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.