Patents by Inventor Karl F. Hens

Karl F. Hens 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).

  • Patent number: 5332537
    Abstract: An improved binder is mixed with powder to form feedstock for molding. The binder includes a first component which is soluble in water and a second component which is insoluble in water. The two binder components are miscible with each other in a liquid state. The two binder components form a uniform heterogeneous mixture when mixed in a liquid state. The binder is mixed with a suitable powder to form the feedstock. The feedstock is molded to form a compact. Polymer units of the binder are cross linked after the compact has been formed. The cross linking of the polymer units of a component of the binder is accomplished by exposing the compact to ultraviolet radiation or by the use of a catalyst. The compact is partially debound by exposing the compact to water, that is, to a water based solvent. Thereafter, the compact is further debound to remove the component which is insoluble in water. The powder is then sintered to form an article.
    Type: Grant
    Filed: December 17, 1992
    Date of Patent: July 26, 1994
    Assignee: PCC Airfoils, Inc.
    Inventors: Karl F. Hens, Donald M. Kupp, Ricky A. Alexander, Karl-Heinz Schofalvi