Patents by Inventor John Gray Dingwall

John Gray Dingwall 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).

  • Substituted propane-phosphonous acid compounds
    Patent number: 5243062
    Abstract: The compounds of the formula ##STR1## in which one of the groups R.sup.1, R.sup.2 and R.sup.3 represents hydrogen, C.sub.1 -.sub.8 -alkyl, C.sub.3 -.sub.6 -cycloalkyl, phenyl optionally substituted by halogeno, C.sub.1 -.sub.4 -alkyl, C.sub.1 -.sub.4 -alkoxy and/or trifluoromethyl, or C.sub.7 -.sub.10 -phenylalkyl optionally substituted in the phenyl moiety by halogeno, C.sub.1 -.sub.4 -alkyl, C.sub.1 -.sub.4 -alkoxy and/or trifluormethyl, and the other two are hydrogen, or salts thereof.These compounds have valuable pharmaceutical properties.
    Type: Grant
    Filed: March 18, 1992
    Date of Patent: September 7, 1993
    Assignee: Ciba-Geigy Corporation
    Inventors: John Gray Dingwall, Josef Ehrenfreund, Roger Graham Hall, James Jack