Patents by Inventor Geoffrey J. R. Barnard

Geoffrey J. R. Barnard 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).

  • Enhanced luminescent assay
    Patent number: 5380650
    Abstract: In an assay in which a ligand is labelled by conjugation to a dihydrophthalazinedione (DPD), e.g. luminol or isoluminol, and the conjugated DPD is reacted with an oxidant, e.g. hydrogen peroxide, and an active heme group catalyst, e.g. microperoxidase, the light intensity is enhanced by certain sterically hindered amines defined as saturated bicyclic compounds having a nitrogen atom at one or both bridgehead positions or a piperidine ring compound having four C.sub.1-4 alkyl groups at the 2- and 6- positions. 1,4-Diazabicyclo[2.2.2]-octane, known as "DABCO" is preferred.
    Type: Grant
    Filed: March 23, 1989
    Date of Patent: January 10, 1995
    Assignee: British Technology Group Ltd.
    Inventors: Geoffrey J. R. Barnard, Dean Goodwin, Robert S. Davidson