Patents by Inventor Stephen H. Calvert

Stephen H. Calvert 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).

  • .beta.-Lactam compounds
    Patent number: 4524073
    Abstract: A compound of formula (I) or a pharmaceutically acceptable salt or in vivo hydrolysable ester thereof: ##STR1## wherein R represents an alkyl or aralkyl group, substituted on an alkyl carbon atom other than that adjacent to --NH-- group, with one or more functional groups selected from halogen, non-aromatic heterocyclyl linked through carbon, aromatic heterocyclyl, nitro, oxo, --OR.sup.1, SR.sup.1 --P(O)R.sup.2 R.sup.3, --NR.sup.4 R.sup.5, .dbd.NR.sup.6, or a sulphur linked organic radical, wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are various organic radicals.Processes for the preparation of these compounds and pharmaceutical compositions containing them are also disclosed.
    Type: Grant
    Filed: July 20, 1983
    Date of Patent: June 18, 1985
    Assignee: Beecham Group p.1.c.
    Inventors: Irene Stirling, Gordon Bruton, Stephen H. Calvert, Brian P. Clarke