Patents by Inventor Erivan Hagopian

Erivan Hagopian 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).

  • Carbon black-rubber masterbatch production
    Patent number: 4029633
    Abstract: This disclosure relates to a continuous process for the preparation of rubber masterbatches.
    Type: Grant
    Filed: April 14, 1976
    Date of Patent: June 14, 1977
    Assignee: Cabot Corporation
    Inventors: Erivan Hagopian, Allan Clark Morgan