Patents by Inventor Philip Graceffa

Philip 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
    Patent number: 4474742
    Abstract: Toxicity of asbestos is reduced by treating it with non-mutagenic non-toxic hydroxamic acid iron-chelating agents.
    Type: Grant
    Filed: February 17, 1983
    Date of Patent: October 2, 1984
    Assignees: Boston Biomedical Research Institute, Inc., The General Hospital Corporation
    Inventors: Philip Graceffa, Sigmund A. Weitzman