Method for the manufacture of parts made of a synthetic material and having a hollow annular section and part thus obtained
CA 2543850 A1 · Owner: Dreyer, Jean-Luc · Inventors: Dreyer, Jean-Luc
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 the manufacture of parts which are made of a synthetic material and which have a hollow annular section said parts being manufactured by prior injection of melted synthetic material into a mold followed by injection of a pressurized fluid in order to force the melted material against the walls of the mold finishing the filling of the mold. The invention also relates to the part thus obtained. The method is characterized in that it essentially consists in injecting melted synthetic material at the level of a nose or hub (3) by means of an opening in the mold and in injecting a fluid close to the nose or hub (3) by means of at least one opening enabling a …
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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 October 27, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 27, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 27, 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.