Patents by Inventor Robert Coudert

Robert Coudert 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).

  • Solvate of lithium hexafluorophosphate and pyridine, its preparation and preparation process for lithium hexafluorophosphate using said solvate
    Patent number: 5993767
    Abstract: The invention relates to a lithium hexafluorophosphate solvate usable for the preparation of high purity lithium hexafluorophosphate.This solvate of lithium hexafluorophosphate and pyridine complies with the formula:Li(C.sub.5 H.sub.5 N)PF.sub.6and is prepared by a process comprising the following stages:a) preparation of pyridinium hexafluorophosphate of formula C.sub.5 H.sub.5 NHPF.sub.6 by the neutralization of hexafluorophosphoric acid HPF.sub.6 with pyridine andb) conversion of the pyridinium hexafluorophosphate into solvate LiPF.sub.6, C.sub.5 H.sub.5 N by exchange with a lithium compound chosen from among lithium hydroxide, lithium alkoxides and alkyl-lithiums.The LiPF.sub.6 can be regenerated from the solvate by vacuum decomposition.
    Type: Grant
    Filed: January 23, 1998
    Date of Patent: November 30, 1999
    Assignee: Centre National D'Etudes Spatiales
    Inventors: Patrick Willmann, Regine Naejus, Robert Coudert, Daniel Lemordant