Patents by Inventor John P. Derdivanis

John P. Derdivanis 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).

  • Dental plaque disclosing agent
    Patent number: 4064229
    Abstract: Disclosing agents for use in control of dental plague. The agents are compositions comprises of FDC Red No. 3 and FDC Blue No. 1; FDC Red No. 3 and FDC Green No. 3 and FDC Red No. 3 and Hercules Green Shade 3.
    Type: Grant
    Filed: July 1, 1976
    Date of Patent: December 20, 1977
    Inventors: Philip L. Block, John P. Derdivanis
  • Dental plaque disclosing compositions
    Patent number: 3997658
    Abstract: Disclosing agents for use in control of dental plaque. The agents are compositions comprises of FDC Red No. 3 and FDC Blue No. 1; FDC Red No. 3 and FDC Green No. 3 and FDC Red No. 3 and Hercules Green Shade 3.
    Type: Grant
    Filed: June 5, 1975
    Date of Patent: December 14, 1976
    Inventors: Philip L. Block, John P. Derdivanis