Patents by Inventor Harlie L. Landrum

Harlie L. Landrum 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).

  • Electrolytic production of stable methyl viologen film
    Patent number: 4144143
    Abstract: A stable, apparently polymeric, form of 1,1'-dimethyl-4,4'-dipyridyl dichloride is non-reversibly produced on a solid, minigrid electrode surface by means of electrolysis of a solution of the dicationic species using a negative applied potential in the range where the cation radical is heterogeneously formed but not negative enough to produce the neutral species. For example, a thin film is formed on a gold electrode at a potential of between about -0.750 V and -0.950 V vs a Ag/AgCl reference electrode.The electrode and stable surface films are electro-active in heterogeneous reduction and oxidation of large biological molecules, making the modified electrode useful, for example, in the quantitative analysis of heme proteins in biological fluids (blood, urine).
    Type: Grant
    Filed: October 25, 1977
    Date of Patent: March 13, 1979
    Assignee: Virginia Commonwealth University
    Inventors: Fredrick M. Hawkridge, Harlie L. Landrum