Patents by Inventor Robert L. Duncan, Jr.

Robert L. Duncan, Jr. 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).

  • Patent number: 4139620
    Abstract: 1-Substituted-3-aminoethoxypyrrolidines having the formula ##STR1## WHEREIN R is benzyl, 2-ethoxyphenoxylower-alkyl, 2-propionyloxy-ethyl, 2-methoxy-4-acetylphenoxylower-alkyl, 4-fluorophenoxy lower alkyl, benzoyloxylower-alkyl, 3,4,5-trimethoxybenzoyloxylower-alkyl, 3,4,5-trimethoxybenzoyl, N-(4-methoxyphenyl) carbamoyl, 2-methoxyphenoxylower-alkyl, 3,4,5-trimethoxyphenyl-acetyl, 2-piperidinoethyl or carbamoyl, and Am is dilower-alkylamino, morpholino or piperidino having hypotensive properties are disclosed.
    Type: Grant
    Filed: December 5, 1977
    Date of Patent: February 13, 1979
    Assignee: A. H. Robins Company, Inc.
    Inventors: Robert F. Boswell, Jr., Robert L. Duncan, Jr.