Patents by Inventor Frederick L. Parker

Frederick L. Parker 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).

  • 4,5-Dihydroimidazo-[1,2-a]quinoxaline-2-carboxylic acids and their derivatives with antiallergic activity
    Patent number: 4464373
    Abstract: Novel imidazoquinoxalines of the formula ##STR1## wherein R.sub.1 is selected from the group consisting of hydroxy, alkoxy of 1 to 5 carbon atoms and cyclohexylcarbonyloxymethoxy, R.sub.2 is selected from the group consisting of hydrogen, alkyl of 1 to 8 carbon atoms, alkoxycarbonylvinyl of 4 to 7 carbon atoms, --COR, --CONH(CH.sub.2).sub.n --X and --A--(CH.sub.2).sub.m --Y, R is selected from the group consisting of hydrogen, alkyl of 1 to 8 carbon atoms, cycloalkyl of 3 to 10 carbon atoms, alkenyl of 2 to 4 carbon atoms, alkoxy of 1 to 5 carbon atoms, alkoxycarbonyl of 2 to 5 carbon atoms, amino, --CF.sub.3, --CHCl.sub.2 --, phenyl, aralkyl of 7 to 10 carbon atoms, aralkoxy of 7 to 10 carbon atoms, n is 0 and X is phenyl or n is an integer from 1 to 5 and X is selected from the group consisting of ##STR2## R.sub.3 and R.sub.
    Type: Grant
    Filed: April 22, 1983
    Date of Patent: August 7, 1984
    Assignee: Roussel Uclaf
    Inventors: Alan C. Barnes, David P. Kay, Peter D. Kennewell, Frederick L. Parker, David A. Rowlands