Patents by Inventor Shao L. Soo

Shao L. Soo 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).

  • Patent number: 4741746
    Abstract: An improved exhaust gas particulate removal system is described which includes a corona-charger that is spark-plug like in configuration. The charger includes a central electrode held within an insulating body, a portion of which electrode is recessed in a cavity formed in the insulating body. A very small amount of clean gas is introduced into the cavity in a manner so as to create a spiral vortex flow about the electrode. The swirling gas flow creates an over-pressure which prevents the exhaust particulate matter from depositing on either the needle electrode or the walls of the cavity. Another swirling air flow, surrounding the exterior of the insulating body, is also provided to prevent the formation of a continuous layer of soot deposit thereupon, with the aid of a cylindrical baffle. The charger is juxtaposed to a conductive attractor electrode to create the desired corona for particulate charging and the path of the exhaust flow is passed between the charger and attractor electrodes.
    Type: Grant
    Filed: January 12, 1987
    Date of Patent: May 3, 1988
    Assignee: University of Illinois
    Inventors: Bei T. Chao, Shao L. Soo
  • Patent number: 4004896
    Abstract: A source of carbon, such as coal, is reacted with excess steam in an amount of about 2 to 10 times the amount necessary for complete reaction with the carbon source so that the steam reactant is the only source of heat necessary to supply the entire heat of reaction. The steam is superheated in a separate vessel in such a manner that it does not contain oxygen, nitrogen or combustion products so that pollutant gases are not found in the reaction product gas since the carbon source never comes in contact with oxygen in the reactor.
    Type: Grant
    Filed: November 21, 1974
    Date of Patent: January 25, 1977
    Assignee: University of Illinois Foundation
    Inventor: Shao L. Soo