Patents by Inventor Janet M. Cassells

Janet M. Cassells 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).

  • Materials and method for the biological production of sulfuric acid
    Patent number: 6790418
    Abstract: A process and apparatus for the biological production of sulfuric acid are provided. The invention utilizes a pile containing a sulfur material, an acidophilic microbe and, preferably, a packing material. The pile is aerated and contacted with an aqueous solution.
    Type: Grant
    Filed: July 11, 2003
    Date of Patent: September 14, 2004
    Assignee: Phillips Petroleum Company
    Inventors: Tom L. Young, Michael G. Greene, Dennis R. Rice, Kelly L. Karlage, Sean P. Premeau, Janet M. Cassells
  • Materials and method for the biological production of sulfuric acid
    Publication number: 20040086450
    Abstract: A process and apparatus for the biological production of sulfuric acid are provided. The invention utilizes a pile containing a sulfur material, an acidophilic microbe and, preferably, a packing material. The pile is aerated and contacted with an aqueous solution.
    Type: Application
    Filed: July 11, 2003
    Publication date: May 6, 2004
    Applicant: PHILLIPS PETROLEUM COMPANY
    Inventors: Tom L. Young, Michael G. Greene, Dennis R. Rice, Kelly L. Karlage, Sean P. Premeau, Janet M. Cassells
  • Method for the microbiological production of sulfuric acid
    Patent number: 6610268
    Abstract: A process and apparatus for the biological production of sulfuric acid are provided.
    Type: Grant
    Filed: April 12, 2000
    Date of Patent: August 26, 2003
    Assignee: Phillips Petroleum Company
    Inventors: Tom L. Young, Michael G. Greene, Dennis R. Rice, Kelly L. Karlage, Sean P. Premeau, Janet M. Cassells