Patents by Inventor Charles B. Welsh

Charles B. Welsh 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).

  • Preparation of mercapto-alcohols
    Patent number: 4281202
    Abstract: A process for preparing mercapto-alcohols by reacting a molar excess of hydrogen sulfide with an alkylene, cycloalkylene, or aralkylene oxide in the presence of an alkali metal zeolite catalyst.
    Type: Grant
    Filed: April 29, 1980
    Date of Patent: July 28, 1981
    Assignee: Pennwalt Corporation
    Inventors: Bernard Buchholz, Charles B. Welsh, Henry C. Miller