Polyaddition products containing hydroxy- and uretdione groups, process for their preparation and their use for the preparation of polyurethane-powder lacquers having high reactivity and not releasing any decomposition product and polyurethane-powder lacquers prepared by this process

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Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.

Why it's free to use

• Filed December 29, 1994 and granted February 18, 1998. A European patent lasts at most 20 years from filing, so its term ended December 29, 2014.
• A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by June 29, 2020.
• We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.