Patents by Inventor Andrew B. McEwen

Andrew B. McEwen 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).

  • Contrast agent for NMR scanning
    Patent number: 4880007
    Abstract: Complexes formed between (a) an amino di- or poly-phosphonate in which phosphonate groups comprise separate carbon atoms and (b) a paramagnetic metal ion such as Gd.sup.3+, have calcified tissue seeking properties which make them useful as contrast agents for investigating bone metabolism by NMR scanning. Two preferred poly-phosphonates are ethylenediamine tetramethylphosphonate and meta-xylene-diamine tetramethylphosphonate.
    Type: Grant
    Filed: July 11, 1986
    Date of Patent: November 14, 1989
    Assignee: Amersham International PLC
    Inventors: Peter J. Sadler, Charles T. Harding, James D. Kelly, Andrew B. McEwen