Coupling of reinforcing fibres to resins in curable composites
CA 2429226 C · Owner: Hodgson, Peter Clifford · Inventors: Hodgson, Peter Clifford
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for preparing a moulded composite comprises milling reinforcing fibres to a mean fibre length of less than 5 mm treating the milled fibres , with a coupling agent and suspending the dried fibres in a liquid resin which reacts with the coupling agent on the fibres. Preferred fibres include glass fibres and milled mica coated with calcined iron oxide. Preferred coupling agents are organosilanes and metal acrylates e.g. zinc diacrylate. Composites formed by the above method exhibit improved impact resistance tensile , strength and flexural strength.
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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 November 16, 2001 and granted June 7, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 16, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 16, 2023.
- 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.