Patents by Inventor John Rickard Mansfield

John Rickard Mansfield 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).

  • Analytical apparatus and processes
    Patent number: 4111776
    Abstract: In apparatus for coulometric analysis provision is made for an automatic change of electrolyte in the event of certain forms of analytical failure.
    Type: Grant
    Filed: June 15, 1976
    Date of Patent: September 5, 1978
    Assignee: Imperial Chemical Industries Limited
    Inventor: John Rickard Mansfield
  • Analytical apparatus
    Patent number: 4066528
    Abstract: Apparatus for coulometry comprises (a) an instrumentation amplifier acting as a differential to single-ended potential convertor having high input impedence, (b) means for feeding (a) with the potential between the sensor and reference electrodes of a coulometric cell and (c) and differential potential input amplifier fed by (a) and by means for setting the output of (c) to zero, the phase shift of the apparatus being less than 90.degree..
    Type: Grant
    Filed: July 19, 1976
    Date of Patent: January 3, 1978
    Assignee: Imperial Chemical Industries Limited
    Inventor: John Rickard Mansfield