Patents by Inventor Phyllis Roberta Hedwall

Phyllis Roberta Hedwall 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).

  • Antihypertensive compositions
    Patent number: 3998955
    Abstract: Pyridines of the formula I ##STR1## wherein R.sub.1 is free hydroxyl, lower alkoxy, cycloalkoxy, amino-lower alkoxy or lower alkoxy-lower alkoxy, free amino, hydroxyamino, lower alkyleneamino, oxa-, aza- or thia-lower alkyleneamino or mono- or di-lower alkylamino, R.sub.2 is oxygen or sulphur, R.sub.3 and R.sub.4 are each alkoxy, free amino, mono- or di-lower alkylamino, lower alkyleneamino, oxa-, aza- or thia-lower alkyleneamino, halogen or free hydroxyl, and either R.sub.3 or R.sub.4 can be hydrogen, and alk is an alkyl group with 3-10 carbon atoms, and their N-oxides, and salts are useful as dopamine-.beta.-hydroxylase inhibitors.
    Type: Grant
    Filed: April 16, 1975
    Date of Patent: December 21, 1976
    Assignee: Ciba-Geigy Corporation
    Inventors: Hans Kuhnis, Christian Egli, Kurt Eichenberger, Phyllis Roberta Hedwall