Aqueous epoxy-amine coating compositions
CA 2073814 C · Owner: Obloh, Ronald · Inventors: Obloh, Ronald; Schwan, Heinrich
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An aqueous coating agent, containing: one or more film-forming water-dilutable or water-soluble epoxy resins with an epoxide equivalent weight of 100 to 10000; one or more water-dilutable or water-soluble polyamines with at least two primary and/or secondary amino groups in the molecule and an equivalent weight of 50 to 500; and optional pigments fillers and/or other conventional lacquer adjuvants; the ratio of reactive H atoms in the polyamines to the epoxy groups in the epoxy resins being 0.7 : 1 to 1.5 : 1; and additionally 5 to 80 wt.% of one or more water-dilutable or water-soluble polyurethane resins with a number average molecular weight (Mn) of 500 to 500000 relative to the sum of …
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 July 16, 1992 and granted October 5, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 16, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 16, 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.