Patents by Inventor Keith Darrel Evans

Keith Darrel Evans 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).

  • Lyophilized edible food incorporating a marker
    Patent number: 7785569
    Abstract: A standardized, lyophilized edible food containing a biologically safe stable marker for use in the measurement of gastric emptying by the quantification of marker excreted in the breath of the patient.
    Type: Grant
    Filed: May 9, 2003
    Date of Patent: August 31, 2010
    Assignee: Advanced Breath Diagnostics, LLC
    Inventors: Keith Darrel Evans, Stanley John Konopka, Kerry Clepper Bush
  • Methods of producing carbon-13 labeled biomass
    Patent number: 6872516
    Abstract: A method and apparatus for preparing uniform carbon-13 labeled biomass using a water soluble carbon-13 labeled carbon source, such as a [13C]-bicarbonate or [13C]-carbonate salt, is disclosed. The biomass is prepared in one or more sterile carboys filled with growth medium, in which acidity, oxygen, and biomass density are carefully monitored and maintained. By using a solid, water-soluble [13C]-bicarbonate or [13C]-carbonate salt as the sole carbon source, a biomass is provided which is uniformly and efficiently labeled with carbon-13. This method and apparatus is particularly useful for the growth of an edible carbon-13 labeled algal mass, with Spirulina platensis being a specific alga species. The biomass may be prepared in conformance with FDA current good manufacturing practice regulations, and may be harvested and formed into lyophilized bulk drug powder which may be further processed into various drug product forms which are useful for diagnostic tests or in pharmaceutical compositions.
    Type: Grant
    Filed: April 16, 2003
    Date of Patent: March 29, 2005
    Assignee: Advanced Breath Diagnostics, LLC
    Inventors: Keith Darrel Evans, Stanley John Konopka, Eric Charles Henry, William Michael Houston
  • Methods of producing carbon-13 labeled biomass
    Publication number: 20040208892
    Abstract: A method and apparatus for preparing uniform carbon-13 labeled biomass using a water soluble carbon-13 labeled carbon source, such as a [13C]-bicarbonate or [13C]-carbonate salt, is disclosed. The biomass is prepared in one or more sterile carboys filled with growth medium, in which acidity, oxygen, and biomass density are carefully monitored and maintained. By using a solid, water-soluble [13C]-bicarbonate or [13C]-carbonate salt as the sole carbon source, a biomass is provided which is uniformly and efficiently labeled with carbon-13. This method and apparatus is particularly useful for the growth of an edible carbon-13 labeled algal mass, with Spirulina platensis being a specific alga species.
    Type: Application
    Filed: April 16, 2003
    Publication date: October 21, 2004
    Inventors: Keith Darrel Evans, Stanley John Konopka, Eric Charles Henry, William Michael Houston
  • Lyophilized edible food including a marker
    Publication number: 20030211042
    Abstract: A standardized, lyophilized edible food containing a biologically safe stable marker for use in the measurement of gastric emptying by the quantification of marker excreted in the breath of the patient.
    Type: Application
    Filed: May 9, 2003
    Publication date: November 13, 2003
    Inventors: Keith Darrel Evans, Stanley John Konopka, Kerry Clepper Bush