Patents by Inventor Joseph O. Hirschfelder

Joseph O. Hirschfelder 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).

  • Hydrodynamic method for separation of solid bodies or crystals
    Patent number: 4010095
    Abstract: A method for hydrodynamic separation of enantiomorphic crystals such as mono-clinic or tri-clinic crystals as well as other bodies, at least one of which does not possess a center of hydrodynamic resistance, wherein said bodies are caused to move in one direction through a fluid in face contact with a supporting surface whereby lateral separation between crystals or bodies are effected in response to a resultant perpendicular force acting on said crystals or bodies.
    Type: Grant
    Filed: August 1, 1974
    Date of Patent: March 1, 1977
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Joseph O. Hirschfelder, Edwin N. Lightfoot, David W. Howard