Patents by Inventor Harry C. Pappas

Harry C. Pappas 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).

  • Charged singlet-oxygen sensitizers and oppositely-charged surfactants
    Patent number: 9968698
    Abstract: The invention relates to compositions including a charged oligo-phenylene ethynylene singlet-oxygen sensitizer and an oppositely-charged surfactant, which show an enhanced biocidal activity relative to a comparable concentration of the oligo-phenylene ethynylene without the oppositely-charged surfactant. The enhancement of biocidal activity is observed with an anionic oligo-phenylene ethynylene in the presence of a cationic surfactant such as TTAB, and with a cationic oligo-phenylene ethynylene in the presence of an anionic surfactant such as SDS.
    Type: Grant
    Filed: November 5, 2014
    Date of Patent: May 15, 2018
    Assignee: STC. UNM
    Inventors: David G. Whitten, Eric H. Hill, Harry C. Pappas
  • CHARGED SINGLET-OXYGEN SENSITIZERS AND OPPOSITELY-CHARGED SURFACTANTS
    Publication number: 20150132184
    Abstract: The invention relates to compositions including a charged oligo-phenylene ethynylene singlet-oxygen sensitizer and an oppositely-charged surfactant, which show an enhanced biocidal activity relative to a comparable concentration of the oligo-phenylene ethynylene without the oppositely-charged surfactant. The enhancement of biocidal activity is observed with an anionic oligo-phenylene ethynylene in the presence of a cationic surfactant such as TTAB, and with a cationic oligo-phenylene ethynylene in the presence of an anionic surfactant such as SDS.
    Type: Application
    Filed: November 5, 2014
    Publication date: May 14, 2015
    Inventors: David G. Whitten, Eric H. Hill, Harry C. Pappas