ALEXANDRIA, Va., May 19 -- United States Patent no. 12,630,781, issued on May 19, was assigned to SYMRISE AG (Holzminden, Germany).
"Fragrance or flavour mixture" was invented by Bernd Hoelscher (Halle, Germany), Vijayanand Chandrasekaran (Holzminden, Germany), Johannes Panten (Hoxter, Germany) and Tobias Voessing (Beverungen, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "Fragrance or flavour mixtures containing (i) (E)-2-methyl-but-2-endicarboxylic acid diesters, (ii) (Z)-2-methyl-but-2-endicarboxylic acid diesters and (iii) 2-methylenebutanedicarboxylic acid diesters with a fruity, pear-like note are provided. Further provided are a process for the preparation of these fragrances or flavourings or...