Patents by Inventor James Walter Ryan

James Walter Ryan 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).

  • Substrates for angiotensin converting enzyme
    Patent number: 4115374
    Abstract: The novel compounds Iodo-p-hydroxyphenyl-glycylglycylglycine and Benzoylprolylphenylalanylarginine are disclosed, together with radioisotope labeled forms thereof, wherein the radioisotope is incorporated in the Iodo-p-hydroxyphenyl moiety or the Benzoyl moiety, respectively. These compounds are useful as substrates for angiotensin converting enzyme in an assay for that enzyme's activity.
    Type: Grant
    Filed: May 10, 1977
    Date of Patent: September 19, 1978
    Inventors: James Walter Ryan, Alfred Chung