Patents by Inventor Preston H. Campbell

Preston H. Campbell 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).

  • Hypochlorous acid process
    Patent number: 4146578
    Abstract: A process for preparing hypochlorous acid is described in which gaseous chlorine is reacted with an aqueous solution of alkali metal hydroxide in a finely divided mist form at an elevated temperature sufficient to prevent condensation of the gaseous product. Gaseous hypochlorous acid product is immediately separated from the resulting solid alkali metal chloride as it is formed and is then scrubbed with water to form an aqueous hypochlorous acid solution. This solution may be reacted with lime to produce calcium hypochlorite.
    Type: Grant
    Filed: December 27, 1977
    Date of Patent: March 27, 1979
    Assignee: Olin Corporation
    Inventors: James P. Brennan, John A. Wojtowicz, Preston H. Campbell