Patents by Inventor John E. Chatfield

John E. Chatfield 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).

  • Continuous treatment process for particulate material
    Patent number: 5153030
    Abstract: A process for continuously producing a treating agent contacted particulate material having a bulk density of about 10 lbs./cu. ft. or less comprising contacting the material with a treating agent as the material is being transferred in dense phases from a storage container to a vessel. The material may be heated after contact if necessary.
    Type: Grant
    Filed: July 9, 1990
    Date of Patent: October 6, 1992
    Assignee: Cabot Corporation
    Inventors: John E. Chatfield, Frederick L. Muller