Patents by Inventor David A. Hasker

David A. Hasker 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).

  • Patent number: 6780651
    Abstract: A method of making strip for testing for the presence of an analyte generally comprises providing a support member which includes a spreading layer and a reagent layer, and a capillary in communication with the support layer and spreading layer for transporting a sample of body fluid thereto.
    Type: Grant
    Filed: June 7, 2001
    Date of Patent: August 24, 2004
    Assignee: Roche Diagnostics Operations, Inc.
    Inventors: Joel S. Douglas, Ryszard Radwanski, Brent G. Duchon, John H. Priest, David A. Hasker, John M. Gleisner
  • Patent number: 6750962
    Abstract: A multi-use assay system accurately docks a removable test strip supporting a reagent-analyte reaction with an optics system including an LED, photodetector, and lenses or light pipes for directing light to and from the test strip. Docking is achieved using alignment fixturing, whereby an optics block holder is relied upon to align the test strip and test pad with the various optical components. Signals from the photodetector indicative of test strip reaction progress are provided to a processor for measuring the analyte.
    Type: Grant
    Filed: April 10, 2001
    Date of Patent: June 15, 2004
    Assignee: Amira Medical
    Inventors: Joel S. Douglas, Jeffrey N. Roe, John H. Priest, John M. Gleisner, Charles C. Raney, David A. Hasker, Ryszard Radwanski, John Ramirez
  • Patent number: 6582573
    Abstract: An electrochemical test device is provided for determining the presence or concentration of an analyte in an aqueous fluid sample. The electrochemical test device includes a working electrode and a counter electrode made of an amorphous semiconductor material. The working electrode is overlaid with a reagent capable of reacting with an analyte to produce a measurable change in potential which can be correlated to the concentration of the analyte in the fluid sample. The test device optionally contains a reference electrode made of an amorphous semiconductor material having a reference material on the reference electrode.
    Type: Grant
    Filed: June 8, 2001
    Date of Patent: June 24, 2003
    Assignee: Amira Medical
    Inventors: Joel S. Douglas, Jeffrey N. Roe, John H. Priest, David A. Hasker
  • Publication number: 20020067484
    Abstract: A multi-use assay system accurately docks a removable test strip supporting a reagent-analyte reaction with an optics system including an LED, photodetector, and lenses or light pipes for directing light to and from the test strip. Docking is achieved using alignment fixturing, whereby an optics block holder is relied upon to align the test strip and test pad with the various optical components. Signals from the photodetector indicative of test strip reaction progress are provided to a processor for measuring the analyte.
    Type: Application
    Filed: April 10, 2001
    Publication date: June 6, 2002
    Inventors: Joel S. Douglas, Jeffrey N. Roe, John H. Priest, John M. Gleisner, Charles C. Raney, David A. Hasker, Ryszard Radwanski, John Ramirez
  • Publication number: 20020052050
    Abstract: A method of making strip for testing for the presence of an analyte generally comprises providing a support member which includes a spreading layer and a reagent layer, and a capillary in communication with the support layer and spreading layer for transporting a sample of body fluid thereto.
    Type: Application
    Filed: June 7, 2001
    Publication date: May 2, 2002
    Inventors: Joel S. Douglas, Ryszard Radwanski, Brent G. Duchon, John H. Priest, David A. Hasker, John M. Gleisner
  • Publication number: 20020020632
    Abstract: An electrochemical test device is provided for determining the presence or concentration of an analyte in an aqueous fluid sample. The electrochemical test device includes a working electrode and a counter electrode made of an amorphous semiconductor material. The working electrode is overlaid with a reagent capable of reacting with an analyte to produce a measurable change in potential which can be correlated to the concentration of the analyte in the fluid sample. The test device optionally contains a reference electrode made of an amorphous semiconductor material having a reference material on the reference electrode.
    Type: Application
    Filed: June 8, 2001
    Publication date: February 21, 2002
    Inventors: Joel S. Douglas, Jeffrey N. Roe, John H. Priest, David A. Hasker
  • Patent number: 6285454
    Abstract: A multi-use assay system accurately docks a removable test strip supporting a reagent-analyte reaction with an optics system including an LED, photodetector, and lenses or light pipes for directing light to and from the test strip. Docking is achieved using alignment fixturing, whereby an optics block holder is relied upon to align the test strip and test pad with the various optical components. Signals from the photodetector indicative of test strip reaction progress are provided to a processor for measuring the analyte.
    Type: Grant
    Filed: December 7, 1998
    Date of Patent: September 4, 2001
    Assignee: Mercury Diagnostics, Inc.
    Inventors: Joel S. Douglas, Jeffrey N. Roe, John E. Priest, John M. Gleisner, Charles C. Raney, David A. Hasker, Ryszard Radwanski, John Ramirez
  • Patent number: 6271045
    Abstract: A strip for testing for the presence of an analyte generally comprises a support member which contains a spreading layer and a reagent layer, and a capillary tube in communication with the support layer and spreading layer for transporting a sample of body fluid thereto. A method of testing a fluid for the presence or concentration of an analyte is also provided which generally includes providing a test strip with a support member, a spreading layer, and a reagent layer on the spreading layer. A capillary tube is provided on the support member whereby a fluid containing an analyte to be tested is introduced into the tube and flows through the tube to the spreading layer and contacts the reagent layer.
    Type: Grant
    Filed: May 7, 1999
    Date of Patent: August 7, 2001
    Assignee: Amira Medical
    Inventors: Joel S. Douglas, Ryszard Radwanski, Brent G. Duchon, John H. Priest, David A. Hasker, John M. Gleisner
  • Patent number: 6245215
    Abstract: An electrochemical test device is provided for determining the presence or concentration of an analyte in an aqueous fluid sample. The electrochemical test device includes a working electrode and a counter electrode made of an amorphous semiconductor material. The working electrode is overlaid with a reagent capable of reacting with an analyte to produce a measurable change in potential which can be correlated to the concentration of the analyte in the fluid sample. The test device optionally contains a reference electrode made of an amorphous semiconductor material having a reference material on the reference electrode.
    Type: Grant
    Filed: September 22, 1999
    Date of Patent: June 12, 2001
    Assignee: Amira Medical
    Inventors: Joel S. Douglas, Jeffrey N. Roe, John H. Priest, David A. Hasker
  • Patent number: 6001239
    Abstract: An electrochemical test device is provided for determining the presence or concentration of an analyte in an aqueous fluid sample. The electrochemical test device includes a working electrode and a counter electrode made of an amorphous semiconductor material. The working electrode is overlaid with a reagent capable of reacting with an analyte to produce a measurable change in potential which can be correlated to the concentration of the analyte in the fluid sample. The test device optionally contains a reference electrode made of an amorphous semiconductor material having a reference material on the reference electrode.
    Type: Grant
    Filed: September 30, 1998
    Date of Patent: December 14, 1999
    Assignee: Mercury Diagnostics, Inc.
    Inventors: Joel S. Douglas, Jeffrey N. Roe, John H. Priest, David A. Hasker
  • Patent number: 5948695
    Abstract: A strip for testing for the presence of an analyte generally comprises a support member which contains a spreading layer and a reagent layer, and a capillary tube in communication with the support layer and spreading layer for transporting a sample of body fluid thereto. A method of testing a fluid for the presence or concentration of an analyte is also provided which generally includes providing a test strip with a support member, a spreading layer, and a reagent layer on the spreading layer. A capillary tube is provided on the support member whereby a fluid containing an analyte to be tested is introduced into the tube and flows through the tube to the spreading layer and contacts the reagent layer.
    Type: Grant
    Filed: June 17, 1997
    Date of Patent: September 7, 1999
    Assignee: Mercury Diagnostics, Inc.
    Inventors: Joel S. Douglas, Ryszard Radwanski, Brent G. Duchon, John H. Priest, David A. Hasker, John M. Gleisner
  • Patent number: D403975
    Type: Grant
    Filed: June 17, 1997
    Date of Patent: January 12, 1999
    Assignee: Mercury Diagnostics, Inc.
    Inventors: Joel S. Douglas, Ryszard Radwanski, Brent G. Duchon, John H. Priest, David A. Hasker, John M. Gleisner