Patents by Inventor David C. Cowell

David C. Cowell 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).

  • Detection of Helicobacter pylori
    Patent number: 6509169
    Abstract: A method for detecting Helicobacter pylori in a subject's gastroenteral tract involves measuring a change in resistance of an electronic or electrochemical sensor, notably a polypyrrole film, on exposure to gas from the subject's lungs and/or stomach. Depending on the magnitude of the change (if any) a positive or negative result is indicated visually by electronics means. Two sensors are used, one of which receives a sample of gas which has passed through an amonia-absorbing means to provide a corrected baseline value for the ammonia. The invention also provides apparatus suitable for carrying out the method.
    Type: Grant
    Filed: July 12, 2001
    Date of Patent: January 21, 2003
    Assignee: University of West England, Bristol
    Inventors: Norman M. Ratcliffe, Clive Teare, Christopher Dunn, David C. Cowell, Caroline Penault, Paul Chambers, Murdo M. Black
  • Detection of Helicobacter Pylori
    Publication number: 20020090667
    Abstract: A method for detecting Helicobacter pylori in a subject's gastroenteral tract involves measuring a change in resistance of an electronic or electrochemical sensor, notably a polypyrrole film, on exposure to gas from the subject's lungs and/or stomach. Depending on the magnitude of the change (if any) a positive or negative result is indicated visually by electronics means. Two sensors are used, one of which receives a sample of gas which has passed through an ammonia-absorbing means to provide a corrected baseline value for the ammonia. The invention also provides apparatus suitable for carrying out the method.
    Type: Application
    Filed: July 12, 2001
    Publication date: July 11, 2002
    Applicant: Hypoguard Limited
    Inventors: Norman M. Ratcliffe, Clive Teare, Christopher Dunn, David C. Cowell, Caroline Penault, Paul Chambers, Murdo M. Black
  • Fluoride ion sensitive materials
    Patent number: 5082540
    Abstract: A fluoride ion sensitive material suitable for use as the active component in a fluoride ion sensitive electrode comprises a sintered mixture comprising of up to 99.9 molar % of Lanthanum trifluoride and from 0.1 to 20 molar % Calcium difluoride formed from a body that has been pressed at 10.sup.7 Pa or more and then sintered in a inert atmosphere at 900.degree. C. or more.
    Type: Grant
    Filed: May 7, 1990
    Date of Patent: January 21, 1992
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: Jeffrey D. Newman, Ramin Pirzad, David C. Cowell, Antony A. Dowman