Pulverulent compounds, a process for their preparation, and their use
CA 2210043 A1 · Owner: Schmitt, Felix · Inventors: Wenning, Andreas; Schmitt, Felix
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a composition containing a 1,2-epoxide compound having more than one 1,2-epoxide group and one or more hydroxyl groups and, as a curing agent a polyisocyanate, blocked with an inert blocking agent and a cyclic amidine of the formula:, (SEE FIG. I) or (SEE FIG. II) (wherein R1 through R12 are each hydrogen or alkyl cycloalkyl, aralkyl or aryl radicals), in which an OH:NCO, ratio is from 1:0.1 to 1:1, the content of the cyclic amidine is from 2 to 9% by weight based on the epoxy compound and the curing agent contains from 0.9 to 0.3 mol of the inert blocking agent and from 0.1 to 0.6 mol of the cyclic amidine per NCO group. The composition is useful as adhesive and forms …
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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 July 9, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 9, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 9, 2019.
- 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.