Methods and preforms for forming composite members with interlayers formed of nonwoven, continuous materials
CA 2580641 C · Owner: Tsotsis, Thomas K. · Inventors: Tsotsis, Thomas K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Materials and methods are provided for producing preform materials for impact-resistant composite materials suitable for liquid molding. Interlayers formed , of nonwoven, continuous fibers such as spunbonded, spunlaced, or mesh fabric are , introduced between non-crimped layers of unidirectional reinforcing fibers to produce , a preform for use in liquid-molding processes to produce a composite member. Curing of the preform provides increased impact resistance by increasing the amount , of energy required to propagate localized fractures due to impact.
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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 19, 2005 and granted December 18, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 19, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.