Patents by Inventor Andri Kucheryna

Andri Kucheryna has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for the preparation of bis(perfluoroalkyl)phosphinic acids and salts thereof
    Patent number: 7202379
    Abstract: The present invention relates to a process for the preparation of bis(perfluoroalkyl)phosphinic acids comprising at least the reaction of at least one difluorotris(perfluoroalkyl)phosphorane or at least one trifluorobis(perfluoroalkyl)phosphorane with hydrogen fluoride in a suitable reaction medium, and heating of the resultant reaction mixture. The invention also relates to salts of bis(perfluoroalkyl)phosphinic acids and to the use thereof.
    Type: Grant
    Filed: March 17, 2003
    Date of Patent: April 10, 2007
    Assignee: Merck Patent GmbH
    Inventors: Urs Welz-Biermann, Nikolai Ignatyev, Michael Weiden, Udo Heider, Andri Kucheryna, Helge Willner, Peter Sartori