Spinneret for forming chemical threads and fibres from solutions
CA 2492760 A1 · Owner: Shagaiskiy, Valentin Aleksandrovich · Inventors: Philippov, Vladimir Borisovich; Kurushin, Boris Leonidovich; Volkov, Vladimir Zakharovich
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to spinnerets for forming chemical threads from solutions, in particular to spinnerets made of zirconium based material. The aim of the invention is to develop a spinneret which excludes the adhesion of material thereof to a cutting tool during the embodiment of a small calibrated hole having a perfect shape, thereby increasing the operating life of said spinneret, the stability of a moulding process and the quality of the such produced threads and fibres without degrading the corrosion stability of the spinneret. To that effect, said spinneret is made of a zirconium alloy containing: 0.05-1.1 mass % of niobium; 0.001-0.2 mass % of oxygen; 0.001- 0.006 mass % …
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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 March 31, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 31, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 31, 2025.
- 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.