Patents by Inventor Gerhard Rotermund

Gerhard Rotermund 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).

  • Continuous manufacture of phthalimide
    Patent number: 4001273
    Abstract: Continuous manufacture of phthalimide by reaction of phthalic anhydride with ammonia and washing the offgas with a melt containing phthalimide. The product is a starting material for the manufacture of dyes, pesticides and pigments, especially copper phthalocyanines.
    Type: Grant
    Filed: July 8, 1974
    Date of Patent: January 4, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Eckhard Hetzel, Ludwig Vogel, Gerhard Rotermund, Hans Christoph Horn