Patents by Inventor Harald Heerdegen

Harald Heerdegen 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).

  • Furfuryl alcohol binders, methods for their production and use
    Patent number: 4634723
    Abstract: A binder material is disclosed formed from furfuryl alcohol suitable for the preparation of molded bodies and cores for molding for the foundry industry based on the following composition:40-60 weight percent higher molecular weight furfuryl alcohol formaldehyde condensation product28-40 weight percent lower molecular weight furfuryl alcohol formaldehyde condensation product12-25 weight percent 2,5-bis-hydroxymethylfuran0-8 weight percent furfuryl alcohol.
    Type: Grant
    Filed: March 22, 1985
    Date of Patent: January 6, 1987
    Assignee: Rutgerswerke Aktiengesellschaft
    Inventors: Arno Gardziella, Alois Kwasniok, Harald Heerdegen, Gerhard Janocha
  • Storage stable, heat curable mixtures of epoxy resins and method for preparing same
    Patent number: 4568727
    Abstract: Storage stable, heat curable mixtures obtained from epoxy resins as a binder system containing latent hardening agents as well as fillers and additive materials which have outstanding mechanical and electrical properties and which are obtained as epoxy resin components of an adduct of a high molecular solid epoxy resin and 4,4'-diaminodiarylalkane in a molecular ratio of 1:0.01 to 0.05. The preferred economical curing agent is a phenol formaldehyde condensation product.
    Type: Grant
    Filed: March 12, 1985
    Date of Patent: February 4, 1986
    Assignee: Rutgerswerke Aktiengesellschaft
    Inventors: Rolf Herzog, Dietrich Tichy, Harald Heerdegen, Rolf Kraas, Ulrich Grundke