Patents by Inventor Denis H. T. Spencer

Denis H. T. Spencer 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 of dechlorinating coal
    Patent number: 4462807
    Abstract: This invention relates to a method of dechlorinating coal, which comprises treating washery-processed coal having a particle size from 1 to 12 mm with aqueous ammonia having a concentration from 1 to 18 M for from 3 to 25 hours.The invention will be of use in the preparation of coal for coal utilization plants so that the coal is less likely to cause corrosion.
    Type: Grant
    Filed: July 21, 1982
    Date of Patent: July 31, 1984
    Assignee: Coal Industry (Patents) Limited
    Inventors: Sarath S. Jayasinghe, Michael A. Hooker, Denis H. T. Spencer