Patents by Inventor Joseph R. Murdoch

Joseph R. Murdoch 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).

  • Multi-optical detection system
    Patent number: 5427915
    Abstract: Apparatus and methods are provided for the detection of analytes. A polyunsaturated polymerized lipid layer is employed, which is anisotropic, has a member of a specific binding pair bound to an end of the lipids, and whose optical characteristics are modified upon complex formation between the specific binding pair member and its complementary member. By providing for polarized light, linear and/or circular, one can detect the presence of complex formation by the change in the optical characteristics of the film. Polarizers, analyzers, and wave plates are employed for providing for a light signal which can be analyzed and related to the presence of an analyte in a sample.
    Type: Grant
    Filed: August 9, 1993
    Date of Patent: June 27, 1995
    Assignee: Biocircuits Corporation
    Inventors: Hans O. Ribi, Todd A. Guion, Joseph R. Murdoch, John C. Scott, Victor Pan, Glenda L. Choate
  • Multi-optical detection system
    Patent number: 5268305
    Abstract: Apparatus and methods are provided for the detection of analytes. A polyunsaturated polymerized lipid layer is employed, which is anisotropic, has a member of a specific binding pair bound to an end of the lipids, and whose optical characteristics are modified upon complex formation between the specific binding pair member and its complementary member. By providing for polarized light, linear and/or circular, one can detect the presence of complex formation by the change in the optical characteristics of the film. Polarizers, analyzers, and wave plates are employed for providing for a light signal which can be analyzed and related to the presence of an analyte in a sample.
    Type: Grant
    Filed: December 13, 1990
    Date of Patent: December 7, 1993
    Assignee: Biocircuits Corporation
    Inventors: Hans O. Ribi, Todd A. Guion, Joseph R. Murdoch, John C. Scott, Victor Pan, Glenda L. Choate
  • Polylactide compositions
    Patent number: 4981696
    Abstract: Systems for delivery of biologically active materials employing novel polylactide composition containing segments of poly(R-lactide) interlocked with segments of poly(S-lactide) as the carrier.
    Type: Grant
    Filed: November 20, 1989
    Date of Patent: January 1, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Gary L. Loomis, Joseph R. Murdoch
  • Polylactide compositions
    Patent number: 4902515
    Abstract: Systems for delivery of biologically active materials employing novel polylactide composition containing segments of poly(R-lactide) interlocked with segments of poly(S-lactide) as the carrier.
    Type: Grant
    Filed: October 12, 1988
    Date of Patent: February 20, 1990
    Assignee: E. I. DuPont De Nemours and Company
    Inventors: Gary L. Loomis, Joseph R. Murdoch
  • Polylactide compositions
    Patent number: 4800219
    Abstract: Novel polylactide composition containing segments or poly(R-lactide) interlocked with segments of poly(S-lactide).
    Type: Grant
    Filed: April 28, 1988
    Date of Patent: January 24, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Joseph R. Murdoch, Gary L. Loomis
  • Polylactide compositions
    Patent number: 4766182
    Abstract: Novel polylactide composition containing segments of poly(R-lactide) interlocked with segments of poly(S-lactide).
    Type: Grant
    Filed: October 15, 1987
    Date of Patent: August 23, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Joseph R. Murdoch, Gary L. Loomis
  • Polylactide compositions
    Patent number: 4719246
    Abstract: Novel polylactide composition containing segments of poly(R-lactide) interlocked with segments of poly(S-lactide).
    Type: Grant
    Filed: December 22, 1986
    Date of Patent: January 12, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Joseph R. Murdoch, Gary L. Loomis