Coating process and composition
CA 2046331 A1 · Owner: Courtaulds Coatings (Holdings) Limited · Inventors: Green, Kevin H.; Mckay, Garry M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
2046331 9008811 PCTABScor01, A surface is coated with a coating composition comprising (A) a hydroxy component having at least two free hydroxy groups and (B) an anhydride component having at least two cyclic carboxylic anhydride groups, at least one of (A) and (B) being a film-forming polymer. An atomised liquid mixture of the hydroxy component (A) and the anhydride component (B) is sprayed on the surface and a separately packaged volatile amine is incorporated in the spray. The invention includes a liquid coating composition comprising the hydroxy component (A) and the anhydride component (B) and a separately packaged volatile amine having a boiling point in the range 50 to 300·C, …
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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 February 5, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 5, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 5, 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.