Patents by Inventor Philip J. Graceffa

Philip J. Graceffa 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).

  • Treatment of asbestos and silicates to reduce their toxicity
    Patent number: 5154903
    Abstract: This invention pertains to an improved method of inhibiting peroxide-reduction catalytic activity and concomitant toxicity of asbestos and nonasbestos iron-containing silicates. These undesirable reactions can be substantially reduced or essentially eliminated by contacting these potentially harmful materials with an aqueous solution comprising a non-mutagenic non-toxic iron chelating agent, such as phytic acid, diethylenetriamine pentaacetic acid (DTPA) or derivatives of these.
    Type: Grant
    Filed: September 13, 1990
    Date of Patent: October 13, 1992
    Assignees: Massachusetts General Hospital, Boston Biomedical Research Institute
    Inventors: Philip J. Graceffa, Sigmund A. Weitzman