Production of thermoplastic polyurethane elastomer tube
CA 2136291 A1 · Owner: Ozaki, Hidenori · Inventors: Fuchimoto, Minoru; Ozaki, Hidenori; Kaide, Tamotsu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for producing a thermoplastic polyurethane elastomer tube, comprising, (a) extruding a thermoplastic polyurethane elastomer on the periphery of a heated mandrel under pressurization (b) pulling out the mandrel to give a tube preform and, (c) hot drawing the obtained tube preform to produce a tube having a desired outer diameter, wherein the temperature of the said mandrel and an extrusion pressure on the elastomer are set in such a manner that they fall within the range where a range permitting hot drawing of the tube preform and a range free from the occurrence of bubbles on the surface of the tube preform overlap, which ranges being determined in advance on the basis of the …
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 November 21, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 21, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 21, 2016.
- 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.