Patents by Inventor Malcolm Oates

Malcolm Oates 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).

  • Thieno[3,2-b]benzofuran and benzothiophene derivatives useful as optical brightening agents
    Patent number: 4526976
    Abstract: Compounds of formula I ##STR1## in which X is O or S;Y is O, S or NR.sub.3 where R.sub.3 is hydrogen or C.sub.1-4 alkyl (preferably methyl or ethyl) and rings A and B may be further substituted by non-chromophoric substituents.
    Type: Grant
    Filed: March 30, 1983
    Date of Patent: July 2, 1985
    Assignee: Sandoz Ltd.
    Inventors: Fritz Fleck, Alec V. Mercer, Malcolm Oates