Patents by Inventor Joseph L. Stahl

Joseph L. Stahl 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).

  • Bromination of polystyrene using bromine as the reaction solvent
    Patent number: 4879353
    Abstract: A process for the bromination of polystyrenic homo- and co-polymers using bromine as the reaction medium, bromine chloride as the bromination reagent and a Lewis acid catalyst substantially improves product quality and permits controlling the reaction to achieve a desired level of bromination.
    Type: Grant
    Filed: October 28, 1988
    Date of Patent: November 7, 1989
    Assignee: Great Lakes Chemical Corporation
    Inventors: David C. Sanders, John L. Sands, Joseph L. Stahl