Patents by Inventor Heinrich Ruppert

Heinrich Ruppert 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 producing dihydroxydiarylalkanes
    Patent number: 4996373
    Abstract: The invention relates to a process for producing dihydroxydiarylalkanes from carbonyl compounds and phenols under high pressure.
    Type: Grant
    Filed: October 10, 1989
    Date of Patent: February 26, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ludwig Bottenbruch, Heinrich Ruppert, Neil S. Isaacs, Kenneth G. Latham