Patents by Inventor Emmanuelle Dall'arche

Emmanuelle Dall'arche 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 synthesis of sublimable oligomers based on phenylene, linear and of controlled length
    Patent number: 5266172
    Abstract: The present invention relates to a process for the preparation of sublimable oligomers based on phenylene, linear and of controlled length, by electrochemical coupling of two lower oligomers within a monocompartmental cell with three electrodes, in the presence of an organometallic catalyst, characterized in that it comprises:1--electrolysis of the catalyst and its reaction with one of the two oligomers at a first potential,2--reduction of the insertion species obtained according to step 1, and its reaction with a second oligomer at a second potential below the first potential, and3--recovery of the sublimable oligomer so obtained, the two lower oligomers used being mono- or dihalogenated oligomers identical or different.The present invention also relates to sublimable oligomers based on phenylene obtained by this process, and their uses in electronics and/or optics.
    Type: Grant
    Filed: June 25, 1991
    Date of Patent: November 30, 1993
    Assignee: France Telecom
    Inventors: Gerard Froyer, Yvan Pelous, Emmanuelle Dall'arche, Claude Chevrot, Alain Siove