Method and apparatus for manufacturing fibre-reinforced material
CA 2016370 C · Owner: Unger, Michael · Inventors: Unger, Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is concerned with a method and an apparatus for impregnating fibre bundles by means of molten or liquid resin in manufacturing a fibre-reinforced material, which material comprises one or more fibre bundles in which each fibre is surrounded by matrix resin by impregnating a continuous web of one or more fibre bundles with a molten or liquid resin and solidifying said resin by cooling or chemical reaction. Before said impregnation the molten or liquid resin material is made subject to shear forces by forcing it to flow through a channel ending at an impregnation point the channel, containing at least one section having decreasing cross-section and/or the channel having 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 May 9, 1990 and granted April 13, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 9, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 9, 2012.
- 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.