Phenol-melamine-urea-formaldehyde copolymer resin compositions, method of making and curing catalysts therefor
CA 2244408 A1 · Owner: Arc Resins Corporation · Inventors: Paventi, Martino
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
27, Disclosed herein is a thermosetting resinous adhesive composition comprising: (a) a thermosetting resin composition comprising phenol, melamine, formaldehyde, and urea said composition comprising at least, 25 weight percent of melamine and at least 10 weight percent of phenol; (b) a curing catalyst; (c) water added in an amount sufficient to impart a suitable viscosity. Also disclosed is a stable copolymer resin precursor composition for use as a precursor to the the thermosetting adhesive. Further disclosed are methods of preparing the adhesive composition and precursor. further disclosed are engineered wood products made in accordance with the present invention.
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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 31, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 31, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 31, 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
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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.