Patents by Inventor Engelbert Weber

Engelbert Weber 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).

  • Aqueous aminoresin solutions for low-formaldehyde surface bonding
    Patent number: 4978711
    Abstract: Aqueous aminoresin solutions for low-formaldehyde surface bonding, based on condensates of melamine, urea, phenol and formaldehyde having a molar ratio of from 1.4 to 1.8 moles of formaldehyde, from 0.04 mole to 0.1 mole of melamine and from 0.015 to 0.04 mole of phenol per mole of urea, relative to the total amount of the aminoresin, are obtainable by mixing(A) from 20 to 40% by weight of melamine/urea/phenol/formaldehyde consensate with(B) from 60 to 80% by weight of a urea/formaldehyde condensate.
    Type: Grant
    Filed: February 24, 1989
    Date of Patent: December 18, 1990
    Assignee: BASF Aktiengesellschaft
    Inventors: Christof Schmidt-Hellerau, Engelbert Weber, Guenther Matthias