Method for making hollow parts of composite material
CA 2254091 C · Owner: Marchant, Pascal Eric Jean · Inventors: Marchant, Pascal Eric Jean
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a method for making hollow parts (1) in composite laminated hot-polymerised material (6) said parts (1) comprising curving walls (3 3a, 3b, 3c) enclosing and forming recesses (2) and optionally non-curving walls (30), i.e. not forming recesses. The method is characterised in that it consists in using mould cores (11) coated (13) with silicon elastomer of sufficient thickness the thermal expansion of the silicon elastomer coating (13) ensuring the compression of the composite material (6) against the mould (7) walls (10).
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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 5, 1998 and granted December 2, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 5, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 5, 2020.
- 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.