Patents by Inventor Chester E. Sievert, Jr.

Chester E. Sievert, Jr. 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: 6394964
    Abstract: A biopsy forceps device is provided for obtaining tissue samples, or removing tissue for therapeutic reasons, at a site within a body, while maintaining access to the site through an access lumen of the biopsy forceps. The device includes an elongate tubular body for introduction into the body and navigation to an area of interest. An inner tubular member having a lumen, or a plurality of lumens, extends through or adjacent the outer tubular member, from the proximal end to the distal end, where cutting jaws are provided. The cutting jaws are rotatably mounted at the distal end of the device and are controlled by movement of the inner tubular member. The inner tubular member is coupled with a handle portion allowing control of the cutting jaws at the proximal end. Access to the lumen of the inner tubular member is gained at the proximal end, where a luer fitting is provided.
    Type: Grant
    Filed: May 19, 2000
    Date of Patent: May 28, 2002
    Assignee: SpectraScience, Inc.
    Inventors: Chester E. Sievert, Jr., Scott R. Wilson, Greg L. Townsend, James L. Pokorney, Brian T. McMahon
  • Patent number: 6174291
    Abstract: A system characterizes tissue using fluorescence spectroscopy, such as light-induced fluorescence. Native fluorescence (“autofluorescence”) from endogenous tissue without requiring fluorescence-enhancing agents is used to distinguish between normal tissue, hyperplastic tissue, adenomatous tissue, and adenocarcinomas. The system provides endoscopic image enhancement for easy location of a tissue site for optical biopsy tissue characterization. The system allows the use of an integrated endoscopic diagnosis and treatment device for immediate diagnosis and treatment without interchanging equipment and relocating the tissue site. The system is also integrated with existing endoscopy equipment for initiating and displaying the diagnosis. The system provides an adjunctive tool to histopathological tissue classification or, alternatively, further treatment is based on the optical biopsy system diagnosis itself.
    Type: Grant
    Filed: March 9, 1998
    Date of Patent: January 16, 2001
    Assignee: SpectraScience, Inc.
    Inventors: Brain T. McMahon, Chester E. Sievert, Jr., Scott R. Wilson, Ronald R. Zimmermann, Robert A. Palme, John G. Yager, David R. Walsh
  • Patent number: 6066102
    Abstract: A biopsy forceps device is provided for obtaining tissue samples at a site within the body, while maintaining access to the site through an access lumen of the biopsy forceps. The device includes an elongate tubular body for introduction into the body and navigation to an area of interest. An inner tubular member having a lumen, or a plurality of lumens, extends through or adjacent the outer tubular member, from the proximal end to the distal end, where cutting jaws are provided. The cutting jaws are rotatably mounted at the distal end of the device and are controlled by movement of the inner tubular member. The inner tubular member is coupled with a handle portion allowing control of the cutting jaws at the proximal end. Access to the lumen of the inner tubular member is gained at the proximal end, where a luer fitting is provided.
    Type: Grant
    Filed: March 9, 1998
    Date of Patent: May 23, 2000
    Assignee: SpectraScience, Inc.
    Inventors: Greg L. Townsend, Brian T. McMahon, Chester E. Sievert, Jr., Scott R. Wilson, James L. Pokorney, John P. Farris, David E. Porter, Mark H. Feddern
  • Patent number: 4926860
    Abstract: Arthroscopic instrumentation for use in arthroscopic surgery and similar procedures. The instrumentation includes a cannula having a curved lumen and an elongated, flexible normally straight shape memory alloy probe. The probe is insertable into the lumen of the cannula, which in turn can be directed to a hard to reach operative site. The cannula causes the probe to bend as it passes the curves of the cannula, but the shape memory character of the probe causes the probe to exit the distal end of the cannula in a substantially straight orientation.
    Type: Grant
    Filed: February 5, 1988
    Date of Patent: May 22, 1990
    Assignee: Flexmedics Corporation
    Inventors: James D. Stice, Chester E. Sievert, Jr., Steven C. Christian