Patents by Inventor by Johanna M. Roesler, executrix

by Johanna M. Roesler, executrix 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).

  • Treatment of biologically-degradable waste
    Patent number: 4416781
    Abstract: A method for the secondary treatment of sewage (and apparatus therefor) having a step in which sewage is circulated in a system having a riser and a downcomer communicating with each other at their upper and lower ends and in which an oxygen-containing gas is supplied to the sewage as it passes through the downcomer. The method is intended for use in the aeration and/or digestion steps of the secondary treatment of sewage. The riser and downcomer are preferably located in a shaft extending into the ground for at least 40 meters below a basin containing the sewage.
    Type: Grant
    Filed: June 14, 1982
    Date of Patent: November 22, 1983
    Assignee: Imperial Chemical Industries PLC
    Inventors: Martin Bailey, David A. Hines, John C. Ousby, Frank C. Roesler, deceased, by Johanna M. Roesler, executrix