Method for preparing a fabric substantially consisting of carbon fibers
CA 2258068 C · Owner: Lenferink, Robert Gerardus · Inventors: Lenferink, Robert Gerardus; Van Dreumel, Wilhelmus Hendrikus Maria
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 fabric substantially consisting of carbon fibres for impregnation with a thermoplastic plastic comprises of:, a) providing a fabric which substantially consists of carbon fibres with a coating of an epoxy material without curer; and, (b) bringing and for a chosen time holding this fabric at an increased temperature such that the carbon fibres remain unaffected and the epoxy material is aged or neutralized and loses its tacky character.
Read the whole patent
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 January 7, 1999 and granted March 20, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 7, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 7, 2021.
- 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.