Patents by Inventor Mathis Gerard

Mathis Gerard 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).

  • Rare earth cryptates, processes for their preparation, synthesis intermediates and application as fluorescent tracers
    Patent number: 5162508
    Abstract: The invention relates to rare earth cryptates consisting of at least one rare earth salt complexed by a macropolycyclic compound corresponding to one of formulae I or II below, in which:the ring ##STR1## is the N.sub.2 O.sub.4 macrocycle, the N.sub.2 O.sub.3 macrocycle or a bis-bipyridine macrocycle;Y is a spacer arm or group which consists of a divalent organic radical selected from linear or branched C.sub.1 to C.sub.20 alkylene groups optionally containing one or more double bonds and/or optionally being interrupted by one or more heteroatoms such as oxygen, nitrogen, sulfur or phosphorus, or from C.sub.5 to C.sub.8 cycloalkylene groups or C.sub.6 to C.sub.
    Type: Grant
    Filed: July 26, 1991
    Date of Patent: November 10, 1992
    Assignee: Compagnie Oris Industrie
    Inventors: Jean-Marie Lehn, Mathis Gerard, Beatrice Alpha, Robert Deschenaux, Etienne Jolu