Patents by Inventor David E. Pitre

David E. Pitre 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).

  • Water-soluble, non-ionizing hydroxy-containing amide derivatives of 2,4,6-triiodo-isophthalic acid
    Patent number: 4001323
    Abstract: Compounds of the formula ##STR1## wherein R and R.sub.1 are 1,3-dihydroxyisopropyl or 2,3-dihydroxypropyl, and R.sub.2 is hydrogen or hydroxyl, are readily water-soluble and of sufficiently low toxicity for use as radiopaque materials in the radiography of body cavities as in urography, angiography, ventriculography, and myelography.
    Type: Grant
    Filed: November 24, 1975
    Date of Patent: January 4, 1977
    Assignee: Savac AG
    Inventors: Ernst Felder, David E. Pitre