Patents by Inventor Franz Mostl

Franz Mostl 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 production of 2,5-dianilino-terephthalic acids
    Patent number: 5659076
    Abstract: A process for the transesterification of dimethyl succinylsuccinate with one or more aliphatic alcohols which in each case have at least 2 C atoms, in the presence of an acidic catalyst and in the presence or absence of a diluent which is inert under the reaction conditions, with exclusion of oxygen and under pressure, at least one of the two methoxy groups being replaced by the oxy group corresponding to the alcohol used and use of the process in a process for the preparation of terephthalic acids and of quinacridones.
    Type: Grant
    Filed: August 25, 1995
    Date of Patent: August 19, 1997
    Assignee: DSM Chemie Linz GmbH
    Inventors: Franz Thomas Schwarz, Johann Altreiter, Franz Mostl
  • Process for the transesterification of dimethyl succinylsuccinate
    Patent number: 5491255
    Abstract: A process for the transesterification of dimethyl succinylsuccinate with one or more aliphatic alcohols which in each case have at least 2 C atoms, in the presence of an acidic catalyst and in the presence or absence of a diluent which is inert under the reaction conditions, with exclusion of oxygen and under pressure, at least one of the two methoxy groups being replaced by the oxy group corresponding to the alcohol used.
    Type: Grant
    Filed: October 18, 1994
    Date of Patent: February 13, 1996
    Assignee: Chemie Linz GmbH
    Inventors: Franz T. Schwarz, Johann Altreiter, Franz Mostl