Patents by Inventor David J. Belton

David J. Belton 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).

  • Pharmaceutically useful furo[3,2-c]pyridines
    Patent number: 5109008
    Abstract: Compounds are disclosed of formula (I) ##STR1## wherein R.sub.1 represents hydrogen, unsubstituted or substituted C.sub.1-6 alkyl, halogen, --COR.sub.4 or --CO.sub.2 R.sub.4 (where R.sub.4 represents hydrogen or unsubstituted or substituted C.sub.1-6 alkyl);R.sub.2 and R.sub.3 are the same or different and are C.sub.1-6 alkyl or C.sub.3-6 alkenyl; or --NR.sub.2 R.sub.3 forms a 5-membered (optionally containing an oxygen atom adjacent to the nitrogen) or a 6-membered ring, which ring optionally contains one unit of unsaturation and which is unsubstituted or substituted by hydroxy, C.sub.1-6 acyloxy, oxo, optionally substituted methylidene, --COR.sub.5 (where R.sub.5 represents C.sub.1-6 alkyl, OR.sub.6 or --NHR.sub.6, andR.sub.6 represents hydrogen, C.sub.1-6 alkyl, aryl or ar(C.sub.1-6)alkyl) or said ring is substituted by .dbd.NOR.sub.7 (where R.sub.7 represents C.sub.1-6 alkyl);Z represents --O-- or --S--;X represents a direct bond, --CH.sub.2 -- or --CH.sub.
    Type: Grant
    Filed: October 18, 1989
    Date of Patent: April 28, 1992
    Assignee: Glaxo Group Limited
    Inventors: David I. C. Scopes, Duncan B. Judd, David J. Belton