Patents by Inventor David J. Spring

David J. Spring 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).

  • Cyclic sulphonamides and sulphinamides having a physiological cooling effect
    Patent number: 4020153
    Abstract: Compositions are disclosed having a physiological cooling action on the skin. The compositions contain, as the active ingredient certain cyclic sulphonamides and sulphinamides.
    Type: Grant
    Filed: July 20, 1973
    Date of Patent: April 26, 1977
    Assignee: Wilkinson Sword Limited
    Inventors: David G. Rowsell, David J. Spring