Epoxy resin with aminomethylene groups
CA 2086906 C · Owner: Basf Lacke + Farben Aktiengesellschaft · Inventors: Lawrenz, Dirk; Heimann, Ulrich; Huemke, Klaus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Epoxy resins with urethane groups, containing on average per molecule from 0.5 to 5 groups of the formula I, where the substituents R1 and R2 are C1-C8-alkyl groups which may also be linked together to form five- or sixmembered rings, which may contain an oxygen atom or are, each phenyl, are useful in electrocoating.
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 January 7, 1993 and granted July 8, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 7, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 7, 2015.
- 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.