Patents by Inventor Glyn E. Lee

Glyn E. Lee 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).

  • Spiramycin esters
    Patent number: 4174391
    Abstract: The spiramycin derivatives of the formula: ##STR1## wherein R.sup.1 represents acetyl, propionyl or hydrogen, A represents butenylene or butadienylene (wherein any double bonds present in A are trans), and R.sup.2 represents a group of the formula: ##STR2## wherein Z represents bivalent saturated or unsaturated alkylene of 1 to 6 carbon atoms, Y represents sulphur or oxygen, and R.sup.3 represents alkyl of 1 to 6 carbon atoms, cycloalkyl of 3 to 8 carbon atoms, aryl or aralkyl in which the alkylene moiety is of 1 to 6 carbon atoms and their non-toxic salts possess therapeutic and growth-promoting activity.
    Type: Grant
    Filed: December 6, 1977
    Date of Patent: November 13, 1979
    Assignee: May & Baker Limited
    Inventors: Robert F. Chapman, David D. Jackson, Glyn E. Lee