Patents by Inventor Geoffrey M. Dunn

Geoffrey M. Dunn 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).

  • Production of hyaluronic acid
    Patent number: 5563051
    Abstract: A process for the production of hyaluronic acid by continuous fermentation of Streptococcus in a chemostat culture gives high yields of high molecular weight hyaluronic acid uncontaminated by toxic impurities. The process is advantageous in that it solves the problem of traditional batch cultures in which degradation enzymes can begin to break down the cell walls of Streptococcus releasing cells contents into the fermenter broth complicating the purification of high molecular hyaluronic acid.
    Type: Grant
    Filed: January 24, 1995
    Date of Patent: October 8, 1996
    Assignee: Fermentech Medical Limited
    Inventors: Derek C. Ellwood, Charles Gervase T. Evans, Geoffrey M. Dunn, Neil McInnes, Richard G. Yeo, Keith J. Smith
  • Production of hyaluronic acid
    Patent number: 5411874
    Abstract: A process for the production of hyaluronic acid by continuous fermentation of Streptococcus equi in a chemostat culture gives high yields of high molecular weight hyaluronic acid uncontaminated by toxic impurities. The process is advantageous in that it solves the problem of traditional batch culture in which degradation enzymes can begin to break down the cell walls of Streptococcus releasing cell contents into the fermenter broth, leading to purification difficulties.
    Type: Grant
    Filed: July 6, 1993
    Date of Patent: May 2, 1995
    Assignee: Fermentech Medical Limited
    Inventors: Derek C. Ellwood, Charles G. T. Evans, Geoffrey M. Dunn, Neil McInnes, Richard G. Yeo, Keith J. Smith