Patents by Inventor Roy Trence Johnson

Roy Trence Johnson 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).

  • Fine bubble airlift device
    Patent number: 7954791
    Abstract: The present invention relates to an aeration device for use in a liquid medium. The device includes a housing adapted to float within the medium such that a top portion thereof remains above a top surface of the medium. The housing has a bottom portion and an open side portion. The device further includes a hose affixed to the bottom portion of the housing substantially parallel to the surface of the liquid medium. The hose has a wall with a plurality of pores formed therein. The device further includes a gas-supplying pipe affixed to the hose and means for supplying a gas to the pipe such that the gas passes through the pipe and into the hose.
    Type: Grant
    Filed: February 26, 2007
    Date of Patent: June 7, 2011
    Assignee: Tekni-Plex, Inc.
    Inventors: William S. Mitchell, Roy Trence Johnson
  • Fine bubble airlift device
    Patent number: 7622040
    Abstract: The present invention relates to an aeration device for use in a liquid medium. The device includes a housing adapted to float within the medium such that a top portion thereof remains above a top surface of the medium. The housing has a bottom portion and an open side portion. The device further includes a hose affixed to the bottom portion of the housing substantially parallel to the surface of the liquid medium. The hose has a wall with a plurality of pores formed therein. The device further includes a gas-supplying pipe affixed to the hose and means for supplying a gas to the pipe such that the gas passes through the pipe and into the hose.
    Type: Grant
    Filed: June 30, 2006
    Date of Patent: November 24, 2009
    Assignee: Tekni-Plex, Inc.
    Inventors: William S. Mitchell, Roland Schmidt, Roy Trence Johnson