Patents by Inventor Richard David Snook

Richard David Snook 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).

  • Determination of toxicity
    Patent number: 5736354
    Abstract: There is disclosed a method of determining the toxicity of a fluid sample comprising the steps of: (i) mixing the sample with a suspension of light emitting organisms; (ii) monitoring the light output (E) of the mixture continually over a period of time (t.sub.o -t.sub.n) using a photodetector device sensitive to the wave length of the emitted light; and (iii) determining the differential d(log E)/dt to give a measure of toxicity concentration.
    Type: Grant
    Filed: March 21, 1996
    Date of Patent: April 7, 1998
    Assignee: Yorkshire Water plc
    Inventors: Peter Robert Fielden, Richard David Snook