Patents by Inventor Leo Pearson

Leo Pearson 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).

  • Cleaning methods and compositions
    Patent number: 4096083
    Abstract: Solvent mixtures which are eminently useful for the removal of toner from items used in copying and duplicating processes consist of 1,1,2-trichloro-1,2,2-trifluoroethane, acetone and methylal.
    Type: Grant
    Filed: May 24, 1976
    Date of Patent: June 20, 1978
    Assignee: Imperial Chemical Industries Limited
    Inventors: John Joseph Clementson, Leo Pearson