Patents by Inventor H. Juergen Dern

H. Juergen Dern 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).

  • Resols, process for their production and use
    Patent number: 6372878
    Abstract: Resols modified with organic phosphonic acids and/or phosphinic acids or their alkali and/or alkaline-earth metal salts obtained by reacting phenolic compounds and aldehyde in an alkaline medium in a molar ratio of the phenolic compounds to the aldehyde in a range from 1:0.3 to 1:6, with the reaction mixture comprising 0.1 to 10 percent by weight of at least one organic phosphonic acids and/or phosphinic acids or their alkali and/or alkaline-earth metal salts.
    Type: Grant
    Filed: July 17, 2000
    Date of Patent: April 16, 2002
    Assignee: Bakelite AG
    Inventors: Sonja Wernik, H. Juergen Dern, Athina Kerkaidou, Stephan Schroeter