Patents by Inventor Preston E. Spires

Preston E. Spires 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).

  • Processes producing methyl mercaptan
    Patent number: 5481042
    Abstract: Described are preferred processes which produce methyl mercaptan from methyl bromide and aqueous mediums of metal hydrosulfide. The processes can be used to simultaneously consume methyl bromide byproduct and aqueous NaSH byproduct while producing methyl mercaptan.
    Type: Grant
    Filed: April 11, 1994
    Date of Patent: January 2, 1996
    Assignee: Great Lakes Chemical Corp.
    Inventors: John L. Burba, III, James T. Ayres, Preston E. Spires, John E. Hill