Patents by Inventor Derek Midgley

Derek Midgley 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).

  • Glass pH electrodes
    Patent number: 5304296
    Abstract: A glass pH electrode which comprises a silver-silver chloride or a mercury-mercurous chloride inner electrode and an electrode filling solution for the inner electrode which is a zwitterionic buffer solution containing chloride ions.
    Type: Grant
    Filed: February 11, 1993
    Date of Patent: April 19, 1994
    Assignee: National Power PLC
    Inventor: Derek Midgley
  • Glass pH electrodes
    Patent number: 5282949
    Abstract: A glass pH electrode which comprises a silver-silver bromide inner electrode and an electrode solution for the inner electrode which is a zwitterionic buffer solution.
    Type: Grant
    Filed: February 11, 1993
    Date of Patent: February 1, 1994
    Assignee: National Power PLC
    Inventor: Derek Midgley
  • Method and apparatus for determining chemical species
    Patent number: 4404287
    Abstract: A method for the quantitative determination of a chemical species capable of promoting the disproportionation of Hg.sub.2.sup.2+ to Hg.sup.2+ and Hg.degree. in solution which method comprises causing the species to react with a solution comprising Hg.sub.2.sup.2+ to thereby produce a measurable concentration of Hg.degree. in a gaseous phase above the solution, and determining the Hg.degree. present in the said gaseous phase.The method is particularly applicable to the determination of low concentrations (e.g. as low as 0.1 p.p.b.) of SO.sub.2 in gas mixtures, such as air.
    Type: Grant
    Filed: November 25, 1980
    Date of Patent: September 13, 1983
    Assignee: Central Electricity Generating Board of Sudbury House
    Inventors: Geoffrey B. Marshall, Derek Midgley