Patents by Inventor Ludwig Schroff

Ludwig Schroff 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).

  • Manufacture of p-alkylphenols
    Patent number: 4198531
    Abstract: p-alkylphenols are manufactured by continuous reaction of phenol with olefins in the presence of a pulverulent polystyrenesulfonic acid ion exchanger which is suspended in the reaction mixture.
    Type: Grant
    Filed: October 14, 1977
    Date of Patent: April 15, 1980
    Assignee: BASF Aktiengesellschaft
    Inventors: Franz Merger, Max Strohmeyer, Gerhard Sandrock, Heinz Hohenschutz, Ludwig Schroff, Gerhard Nestler