Premoulding material having long-term controllable b-stage characteristic comprising a phenol resin
CA 2004669 A1 · Owner: Reichhold Chemie Ges.M.B.H. · Inventors: Fucik, Ivan T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Premoulding materials having long-term controllable B-stage characteristic, comprising phenol resins optionally with reagents, additives and adjuvants are, characterised in that they contain hydraulic binder and/or its components as well as an agent that reduces the alkalinity and optionally the content of free metal ions. For its preparation, 1 part by wt. phenol resin is mixed with less than 4 parts by wt. of a hydraulic binder and/or its components as well as less than 0.2 equivalent parts by weight of the agent. The phenol resin premoulding materials according to the invention thicken quickly to a desired B-stage, are capable of maintaining the attained plateau, and thus allow the …
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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 December 5, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 5, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 5, 2011.
- 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
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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.