Process for the manufacture of epoxy compounds
CA 2300167 A1 · Owner: Walhof, Judith Johanna Berendina · Inventors: Smits, Jozef Jacobus Titus; Walhof, Judith Johanna Berendina; Meurs, Jan Hermen Hendrik
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process for the manufacture of epoxy compounds of formula (D) wherein Rb represents a group selected from those of the formulae (1 2 and 3) by , reaction of a compound (A) or (B) with an alkylene oxide in the presence of a , catalyst, selected from the group of compounds containing at least one cation (C) in combination with a counter anion X- selected from halogen acetate, phosphate or carboxylate or combinations thereof; manufacturing process for epoxy resins comprising at least the hereinbefore specified reaction step and , epoxy resins obtainable by said process characterized by lower halogen , content.
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 August 13, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 13, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 13, 2020.
- 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.