Partial esters of saturated, straight chain C22-C34 monocarboxylic acids with polyols, method for their production, their application as separating agents for plastics including plastics containing them, especially based on PVC or PVC copolymers

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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 14, 1987 and granted April 28, 1993. A European patent lasts at most 20 years from filing, so its term ended December 14, 2007.
• 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 14, 2013.
• 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.