Patents by Inventor Melvern C. Hoff

Melvern C. Hoff 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: 4864070
    Abstract: A process is disclosed for separation of ortho chlorotoluene and ortho-dichlorobenzene from their meta and para isomers by use of a specific crystalline aluminophosphate adsorbent which selectively removes the above ortho aromatic isomers. The selectively adsorbed ortho aromatic isomers are removed from the adsorbent through a desorption step.
    Type: Grant
    Filed: March 28, 1988
    Date of Patent: September 5, 1989
    Assignee: Amoco Corporation
    Inventors: Melvern C. Hoff, Raymond C. Feld