An aqueous coating composition and its use for coating mineral substrates
CA 2070147 C · Owner: Gruber, Hermann · Inventors: Kober, Hermann; Gruber, Hermann; Reiff, Helmut
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a coating composition which contains, A) 100 parts by weight of a water-soluble polyether component having an average hydroxyl functionality of least 2.5 and an average OH number of 100 to 600 and containing at least one polyether polyol, B) 40 to 240 parts by weight of a water-soluble or water-dispersible polyisocyanate component containing at least one nonionically/hydrophilically modified organic polyisocyanate having (cyclo)aliphatically bound isocyanate groups, C) 10 to 50 parts by weight magnesium oxide and/or hydroxide in finely dispersed form and, D) 50 to 150 parts by weight water. The present invention also relates to mineral substrates coated with …
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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 June 1, 1992 and granted February 4, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 1, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 1, 2014.
- 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.