Patents by Inventor David L. Gagnon

David L. Gagnon 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).

  • Patent number: 4107283
    Abstract: A tracer comprising a polymer coated ion exchange core either labelled with nuclide, stable or radioactive or unlabelled and finding particular utility in circulatory determinations in animals or in the chemical process industries to detect or measure fluid flow.
    Type: Grant
    Filed: July 19, 1976
    Date of Patent: August 15, 1978
    Assignee: New England Nuclear Corporation
    Inventors: Frederick P. Pratt, David L. Gagnon