Cold drawing apparatus
CA 2313864 C · Owner: Kobayashi, Toshio · Inventors: Kobayashi, Toshio; Yoshida, Masaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cold drawing apparatus 1 is interposed in a system for making a fibrous web 14 and has an inlet for a plurality of melt spun continuous filaments 13, an outlet for the filaments 13 and a pair of side walls extending between said in- and outlets and opposed to and spaced from each other in a transverse direction to define a passage therebetween so that the filaments 13 are cooled and drawn as the filaments 13 pass through the passage defined between the opposed side walls wherein at least one of the side walls is formed with a plurality of crests at predetermined intervals and a plurality of troughs each extending between each pair of the adjacent crests.
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 13, 2000 and granted November 25, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 13, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 13, 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.