Patents by Inventor Douglas H. Lowenthal

Douglas H. Lowenthal 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).

  • Elemental tracer system for determining the source areas of pollution aerosol
    Patent number: 4603575
    Abstract: A method of determining source areas of pollution aerosol. Selected pollution derived, fine particle tracer elements from within the source region are measured. The measured results are expressed as ratios to one of the tracer elements. A signature of the source region is determined from modes in the logarithmic frequency of the ratios of the tracer elements. Measurements are made of the tracer elements from a receptor region and elemental ratios constructed. The elemental ratios from the receptor region are compared with the signatures from possible source regions to determine the most probable source region.
    Type: Grant
    Filed: December 27, 1984
    Date of Patent: August 5, 1986
    Assignee: Board of Governors for Higher Education, State of Rhode Island and Providence Plantations
    Inventors: Kenneth A. Rahn, Douglas H. Lowenthal