Patents by Inventor Lee Josephson

Lee Josephson 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).

  • Enzymatic reactions using magnetic particles
    Patent number: 4698302
    Abstract: A process is provided for the preparation of magnetic particles to which a wide variety of molecules may be coupled. The magnetic particles can be dispersed in aqueous media without rapid settling and conveniently reclaimed from media with a magnetic field. Preferred particles do not become magnetic after application of a magnetic field and can be redispersed and reused. The magnetic particles are useful in biological systems involving separations.
    Type: Grant
    Filed: June 13, 1985
    Date of Patent: October 6, 1987
    Assignee: Advanced Magnetics, Inc.
    Inventors: Roy A. Whitehead, Mark S. Chagnon, Ernest V. Groman, Lee Josephson
  • Magnetic particles for use in separations
    Patent number: 4695393
    Abstract: A process is provided for the preparation of magnetic particles to which a wide variety of molecules may be coupled. The magnetic particles can be dispersed in aqueous media without rapid settling and conveniently reclaimed from media with a magnetic field. Preferred particles do not become magnetic after application of a magnetic field and can be redispersed and reused. The magnetic particles are useful in biological systems involving separations.
    Type: Grant
    Filed: June 13, 1985
    Date of Patent: September 22, 1987
    Assignee: Advanced Magnetics Inc.
    Inventors: Mark S. Chagnon, Ernest V. Groman, Lee Josephson, Roy A. Whitehead
  • Magnetic particles for use in separations
    Patent number: 4695392
    Abstract: A process is provided for the preparation of magnetic particles to which a wide variety of molecules may be coupled. The magnetic particles can be dispersed in aqueous media without rapid settling and conveniently reclaimed from media with a magnetic field. Preferred particles do not become magnetic after application of a magnetic field and can be redispersed and reused. The magnetic particles are useful in biological systems involving separations.
    Type: Grant
    Filed: June 13, 1985
    Date of Patent: September 22, 1987
    Assignee: Advanced Magnetics Inc.
    Inventors: Roy A. Whitehead, Mark S. Chagnon, Ernest V. Groman, Lee Josephson
  • Magnetic particles for use in separations
    Patent number: 4672040
    Abstract: Methods are provided for the use of magnetically responsive particles in systems in which the separation of certain molecules, macromolecules and cells from the surrounding medium is desirable. The magnetically responsive particles may be coupled to a wide variety of molecules. The magnetic particles can be dispersed in aqueous media without rapid settling and conveniently reclaimed from media with a magnetic field. Preferred particles do not become magnetic after application of a magnetic field and can be redispersed and reused.
    Type: Grant
    Filed: June 28, 1985
    Date of Patent: June 9, 1987
    Assignee: Advanced Magnetics, Inc.
    Inventor: Lee Josephson
  • Binding assays employing magnetic particles
    Patent number: 4628037
    Abstract: A process is provided for the preparation of magnetic particles to which a wide variety of molecules may be coupled. The magnetic particles can be dispersed in aqueous media without rapid settling and conveniently reclaimed from media with a magnetic field. Preferred particles do not become magnetic after application of a magnetic field and can be redispersed and reused. The magnetic particles are useful in biological systems involving separations.
    Type: Grant
    Filed: June 13, 1985
    Date of Patent: December 9, 1986
    Assignee: Advanced Magnetics, Inc.
    Inventors: Mark S. Chagnon, Ernest V. Groman, Lee Josephson, Roy A. Whitehead
  • Magnetic particles for use in separations
    Patent number: 4554088
    Abstract: A process is provided for the preparation of magnetic particles to which a wide variety of molecules may be coupled. The magnetic particles can be dispersed in aqueous media without rapid settling and conveniently reclaimed from media with a magnetic field. Preferred particles do not become magnetic after application of a magnetic field and can be redispersed and reused. The magnetic particles are useful in biological systems involving separations.
    Type: Grant
    Filed: May 12, 1983
    Date of Patent: November 19, 1985
    Assignee: Advanced Magnetics Inc.
    Inventors: Roy A. Whitehead, Mark S. Chagnon, Ernest V. Groman, Lee Josephson
  • Prostatic acid phosphatase immuno assay
    Patent number: 4267272
    Abstract: Prostatic acid phosphatase is immunologically unstable under typical laboratory conditions. Thus it is necessary to combine a stabilizing composition with samples taken for immunological assay of prostatic acid phosphatase content, and to similarly stabilize prostatic acid phosphatase-containing reagents in kits used to assay the enzyme.
    Type: Grant
    Filed: November 5, 1979
    Date of Patent: May 12, 1981
    Assignee: Baxter Travenol Laboratories, Inc.
    Inventor: Lee Josephson