Patents by Inventor David R. Schneider

David R. Schneider 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).

  • Method and apparatus for preserving human saliva for testing
    Patent number: 6291178
    Abstract: A method and apparatus for the preservation of a saliva sample for use in subsequent quantitative chemical assays. The method involves collecting a saliva sample at a location, directly into a specimen cup. The specimen cup contains a predetermined volume of aqueous solution of pH buffered saline and enzymatic inhibitor and is optionally adapted with a constituent compound specific, qualitative test unit.
    Type: Grant
    Filed: August 30, 1999
    Date of Patent: September 18, 2001
    Inventor: David R. Schneider
  • Method and apparatus for preserving human saliva for testing
    Patent number: 5968746
    Abstract: A method and apparatus for the preservation of a saliva sample for use in subsequent quantitative chemical assays. The method involves collecting a saliva sample at a location, directly into a specimen cup. The specimen cup contains a predetermined volume of aqueous solution of pH buffered saline and enzymatic inhibitor and is optionally adapted with a constituent compound specific, qualitative test unit.
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: October 19, 1999
    Inventor: David R. Schneider
  • Gas-assisted injection molding apparatus
    Patent number: 5284429
    Abstract: A thermoplastic article can be injection molded in a mold (10) which includes a cavity (28) defining the shape of the article, at least one thermoplastic entry aperture (23) which is adapted to receive molten thermoplastic resin from a nozzle (22) of an injection molding machine (24), a thermoplastic flow path (21, 26, 30) communicating with the thermoplastic entry aperture and the cavity, and a fluid flow passageway (32, 34) extending into the mold. The fluid flow passageway extends from an exterior surface of the mold to the thermoplastic flow path. A low viscosity fluid such as a gas can be injected through the fluid flow passageway and into the thermoplastic flow path. An end portion (44) of the fluid is flow passageway adjacent the thermoplastic flow path has a porous me lug (50) disposed therein. The porous metal plug includes a porous metal core (64) which permits the low viscosity fluid to flow therethrough but prevents the passage of molten plastic therethrough.
    Type: Grant
    Filed: May 7, 1992
    Date of Patent: February 8, 1994
    Assignee: Cascade Engineering, Inc.
    Inventors: David R. Schneider, Robert W. Russell, Brett S. Sorola
  • Method and contrast agent for use in magnetic resonance imaging of abscess
    Patent number: 5145661
    Abstract: A method and contrast agent for magnetic resonance imaging (MRI) of abscesses. Granulocytes are separated from whole blood and incubated with an imaging vehicle such as polymer-coated magnetite. The granulocytes encapsulate the imaging vehicle and are suspended in an intravascularly administrable carrier to form the contrast agent. The contrast agent is highly specific for MRI of abscesses.
    Type: Grant
    Filed: July 15, 1991
    Date of Patent: September 8, 1992
    Assignee: Wayne State University
    Inventors: David R. Schneider, Kostaki G. Bis
  • Contras agent having an imaging agent coupled to viable granulocytes for use in magnetic resonance imaging of abscess and a method of preparing and using same
    Patent number: 5045304
    Abstract: A method and contrast agent for magnetic resonance imaging (MRI) of abscess. Granulocytes are separated from whole blood and incubated with an imaging vehicle such as magnetite. The granulocytes encapsulate the imaging vehicle and are suspended in an intravascularly administrable carrier to form the contrast agent. The contrast agent is highly specific for MRI of abscess.
    Type: Grant
    Filed: August 31, 1988
    Date of Patent: September 3, 1991
    Assignee: Wayne State University
    Inventors: David R. Schneider, Kostaki G. Bis
  • Microwave chamber for heating biological matter
    Patent number: 4866231
    Abstract: An applicator sheath for use with a microwave energy source for controlled heating of biological matter. The sheath has a chamber lined with a metallic absorbing material to alternate energy delivered by the microwave energy source. The energy is delivered into the chamber through a leaky waveguide.
    Type: Grant
    Filed: April 1, 1988
    Date of Patent: September 12, 1989
    Inventor: David R. Schneider