Patents by Inventor Billy T. Hanvey

Billy T. Hanvey 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).

  • Multiple polyesterification process
    Patent number: 4079046
    Abstract: A semi-continuous polyester esterification process employing continuous feeding and discontinuous withdrawal is combined with a plurality of batch polycondensation processes to produce outstanding polyester polymer with improved flexibility (of process and product) and efficiency.
    Type: Grant
    Filed: June 3, 1976
    Date of Patent: March 14, 1978
    Assignee: Monsanto Company, St. Louis, Missouri
    Inventors: Edmond P. Brignac, Billy T. Hanvey