Patents by Inventor John Dodgson

John Dodgson 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).

  • Patent number: 6454923
    Abstract: A gas sensor is described which is particularly well suited as a carbon monoxide (CO) sensor in a self test gas sensor. The sensor includes a number of aspects which may or may not be used in conjunction with one another. A first aspect is an embodiment which reduces electrical interference (or cross-talk) between a test or gas generating cell and a sensing cell. In one embodiment, baffles are provided to prevent cross-talk. In another embodiment a switching circuit ensures that a test gas generator is operational only when the gas sensor is disconnected from a current source. A second aspect is an embodiment which includes an improved wick which is in close proximity with an electrode and ensures electrolyte is always in contact with the electrode. In an alternate embodiment a solid polymer electrolyte is used between the electrodes. A third aspect is an improved catalyst which reduces the reaction energy and thereby renders the sensor more sensitive. The catalyst is also cheaper than platinum.
    Type: Grant
    Filed: June 23, 2000
    Date of Patent: September 24, 2002
    Assignee: Central Research Laboratories Limited
    Inventors: John Dodgson, John Edward Andrew Shaw, Malcolm Austen, Monica Backes
  • Publication number: 20020063067
    Abstract: The present invention relates to a high through-put system for determining and/or monitoring electrophysiological properties of ion channels of ion channel-containing membranes, typically lipid membrane-containing structures such as cells. In particular, the invention provides a substrate which provides means for automatically positioning cells at measuring sites using electroosmotic flow in canals formed on or in the substrate. The electroosmotic flow is generated and controlled by electroosmotic flow pumps integrated on the substrate or positioned in relation thereto. Thereby, cells can be positioned in favorable measurement configuration at a plurality of sites for performing testing and measurements. Also, the invention relates to a main electric circuit for performing testing and measurements on a plurality of cells in parallel.
    Type: Application
    Filed: October 2, 2001
    Publication date: May 30, 2002
    Inventors: Morten Bech, Jorgen Due, Lars Thomsen, Jonatan Kutchinsky, Rafael Taboryski, Bent Erling Nielsen, John Shaw, John Dodgson