Aqueous coating agent, its manufacture and use for producing layers of filler
CA 2086156 A1 · Owner: Herberts Gesellschaft Mit Beschrankter Haftung · Inventors: Graf, Knut; Goldner, Wolfgang; Georgiadis, Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
23, Abstract, Aqueous coating agent comprising a water-dilutable mixture of binding agents consisting of, I. 50 to 88 wt.-% of a neutralised water-soluble reaction product comprising, (A) 10 to 80 wt.-% of a polyurethane resin with an acid number of 70 to 160, at least one terminal blocked isocyanate group devoid of free hydroxyl groups and fatty acid residues with more than 12 Catoms and with a limiting viscosity number of 6.5 to 12.0 ml/g, measured in DMF at 20°C, and (B) 20 to 90 wt.-% of a polyester resin with an OH-number of 50 to 500, an acid number of less than 20, a limiting viscosity number of 8.0 to 13.0 ml/g, measured in DMF at 20°C, with the reaction product having a limiting …
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 December 23, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 23, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 23, 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
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.