Preparation and use of resins that are relatively non-inflammable and resistant to high temperatures
CA 2042840 C · Owner: Knaus, Bruno · Inventors: Knaus, Bruno; Schreiber, Herbert; Burkart, Gunter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Polymeric resins which are difficultly inflammable and/or resistant to high temperatures are obtained by curing a curable resin mixture which comprises a mixture of: (a) a component consisting of at least one thermically curable 1-oxa-3-aza tetraline groups containing compound;, (b) a component consisting of at least one curable halogenated epoxy resin; and optionally (c) a component consisting of at least one curable nonhalogenated epoxy resin; and/or optionally (d) a curing agent for epoxy resins. By tempering them the glass transition temperature and the mechanical properties can be further improved. The obtained polymeric resins may be used as follows: as electric insulating materials, …
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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 17, 1991 and granted November 26, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 17, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 17, 2013.
- 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.