Process for the preparation of plastic moldings
CA 2030599 A1 · Owner: Muller, Hanns-Peter · Inventors: Muller, Henry; Franke, Joachim; Muller, Hanns-Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Mo3503, LeA 27,404, A PROCESS FOR THE PREPARATION OF PLASTIC MOLDINGS ABSTRACT OF THE DISCLOSURE, The invention relates to the preparation of plastic moldings by curing reactive, liquid casting compositions at elevated temperatures using a process in which (1) a liquid casting composition is prepared by reacting (a) an organic polyisocyanate, and (b) an organic compound containing at least two epoxide groups in a quantity corresponding to an equivalent ratio of isocyanate groups to epoxide groups of about 1.2:1 to about 500:1 in the, presence of (d) a stabilizing alkylating sulfonic acid alkyl ester, methyl iodide, or dimethyl sulfate (e) a, latent, heat-activatable catalyst (preferably a …
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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 22, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 22, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 22, 2012.
- 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.