Patents Examined by Murkund J. Shah
  • 4-(purinyl bases)-substituted-1,3-dioxlanes
    Patent number: 5270315
    Abstract: There is provided novel 2-substituted-4-substituted-1,3-dioxolanes which are particularly useful as antiviral agents.
    Type: Grant
    Filed: March 7, 1991
    Date of Patent: December 14, 1993
    Assignee: BioChem Pharma Inc.
    Inventors: Bernard Belleau, Dilip Dixit, Nghe Nguyen-Ba
  • Composite densification with benzoxazines
    Patent number: 5266695
    Abstract: The compounds are of the class of multi-functional benzoxazine compounds, useful in forming carbon-carbon composites by means of the pyrolysis of carbon fibers impregnated with such compounds.
    Type: Grant
    Filed: October 5, 1992
    Date of Patent: November 30, 1993
    Assignee: Edison Polymer Innovation Corporation
    Inventor: Hatsuo Ishida
  • Fluorescent poly(arylpyridine) rare earth chelates
    Patent number: 5252740
    Abstract: A class of fluorescent rare earth chelates and the ligands upon which they are based whose molecular structure incorporates a plurality of substituted arylpyridine diacid units attached to a central template structure is disclosed. These ligands function as efficient energy transfer groups in fluorescent tagging reagents and tracers.
    Type: Grant
    Filed: October 2, 1991
    Date of Patent: October 12, 1993
    Assignee: Baxter Diagnostics Inc.
    Inventors: Ron L. Hale, Dennis W. Solas
  • Fluoridated monomers based on 9-phenyl-9-perfluoroalkylxanthene
    Patent number: 5202446
    Abstract: Disclosed are rigid fluorinated monomers 9-phenyl-9-perfluoroalkylxanthene ##STR1## . The monomers have utility in the preparation of advanced high-performance polymers, particularly polyimides.
    Type: Grant
    Filed: June 21, 1991
    Date of Patent: April 13, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Swiatoslaw Trofimenko