Flame-retardant epoxy resin composition and cured object obtained therefrom
CA 2507630 A1 · Owner: Uchida, Makoto · Inventors: Ishikawa, Kazunori; Moteki, Shigeru; Uchida, Makoto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An epoxy resin composition which comprises (a) an epoxy resin and (b) a polyamide resin containing phenolic hydroxy groups which has a structure represented by the formula (1); a method of curing the composition; a varnish prepreg, or sheet comprising or obtained with the composition; and an epoxy resin hardener which contains as an active ingredient a polyamide resin represented by the formula (1). The epoxy resin composition gives a cured object which has sufficient flexibility even when it is in a thin film form. The cured object further has flame retardancy although it contains none of flame retardants such as halogenated flame retardants and antimony compounds and is excellent …
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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 27, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 27, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 27, 2025.
- 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.