Patents by Inventor Michael Ernest Garrett

Michael Ernest Garrett 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 sewage
    Patent number: 4039437
    Abstract: The invention provides a method of, and apparatus for, treating sewage flowing through a sewer, wherein an oxygenating gas is introduced under pressure into the sewage and is dissolved therein and the thus oxygenated sewage is contact with a matrix of solid material carrying micro-organisms effective to reduce the Biochemical Oxygen Demand of the sewage, the matrix extending across a region inside the sewer. The treatment may be performed in a gravity sewer or in a rising or pumping sewer.
    Type: Grant
    Filed: May 8, 1975
    Date of Patent: August 2, 1977
    Assignee: BOC Limited
    Inventors: Kenneth Cecil Smith, Michael Ernest Garrett
  • Dissolving gas in liquid
    Patent number: 4000227
    Abstract: A soluble gas such as oxygen is dissolved in a liquid such as aqueous sewage liquors by introducing the gas into a stream of the liquid and passing the resultant stream downwards into a body of the liquid through a conduit of divergent cross-section in the direction of flow of the liquid.
    Type: Grant
    Filed: September 24, 1974
    Date of Patent: December 28, 1976
    Assignee: BOC International Limited
    Inventor: Michael Ernest Garrett