Patents by Inventor Charles Arnold Herich

Charles Arnold Herich 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).

  • Method for on-line cleaning of sulfur deposits
    Patent number: 5979470
    Abstract: A method for on-line cleaning of sulfur deposits collected in the absorber column in a Stretford-type process by washing the sulfur deposits with hot caustic solutions while H.sub.2 S is removed from sour gas in the absorber column.
    Type: Grant
    Filed: October 3, 1997
    Date of Patent: November 9, 1999
    Assignee: Shell Oil Company
    Inventor: Charles Arnold Herich