Patents by Inventor Michael W. Stewart

Michael W. Stewart 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).

  • Publication number: 20030082224
    Abstract: The present invention relates generally to methods and compositions for targeting and delivering solid-phase platelet-dependent vascular occlusion agents. In particular, particles or coils or stents coated with platelet binding agents are directed to target vasculature, such as the vasculature of solid tumor masses or AV-malformations or aneurysms or endoleaks; the solid-phase agent then binds and activates platelets, which in turn bind and activate other platelets. This process results in the rapid formation of a platelet-mediated thrombus about the solid-phase agent causing vessel occlusion.
    Type: Application
    Filed: September 12, 2002
    Publication date: May 1, 2003
    Inventors: Antoine Noujaim, Roland H. Person, Michael W. Stewart
  • Publication number: 20020040691
    Abstract: A cardon joint is provided for mounting in a wall of a boiler to accommodate a sootblower lance and to allow the lance to be manipulated with respect to the boiler wall. The cardon joint includes a wall box having a central opening. An outer ball having a substantially spherical outer surface and a central bore is mounted for axial rotation about a first axis within the central opening of the wall box. An inner ball having a substantially spherical outer surface and a central bore is mounted for axial rotation about a second axis within the central bore of the outer ball. The first and second axes are mutually orthogonal and the central bore of the inner ball is sized to accommodate the lance of a sootblower. As the lance is manipulated to clean an opposite wall of the boiler, the inner and outer balls rotate about their axes to accommodate the manipulation.
    Type: Application
    Filed: August 31, 2001
    Publication date: April 11, 2002
    Inventors: Michael W. Stewart, Jeffrey A. Atchley
  • Patent number: 5952184
    Abstract: The invention provides a method for determining platelet function in a mammal comprising providing platelets from the mammal, contacting the platelets in suspension with at least one immobilised ECM protein or an effective fragment or analog thereof while applying to the platelets an effective mechanical stimulus for an effective period of time and determining the platelet activation produced.The invention provides a method for monitoring the efficacy of pharmacological agents affecting platelet function in vivo and in vitro.
    Type: Grant
    Filed: May 3, 1995
    Date of Patent: September 14, 1999
    Assignee: Alberta Cancer Board
    Inventors: Andrew R. E. Shaw, Michael W. Stewart
  • Patent number: 5840587
    Abstract: The invention provides phospholipid coated particles capable of specifically binding antiphospholipid antibodies and a method for preparing such particles. Methods are also provided for determining antiphospholipid antibodies in a serum or plasma. Also provided are methods for isolating antiphospholipid antibodies from a fluid and for raising specific antiphospholipid antibodies.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: November 24, 1998
    Assignee: University Hospitals Board
    Inventors: Michael W. Stewart, Phillip A. Gordon, Wai Sum Etches
  • Patent number: 5626098
    Abstract: A collapsible cage for dogs or rabbits has a rectangular base, fold-down end walls folding side walls and a roof. The walls and roof are made of metal grids. The end walls fold down onto the base one over the other. The side walls fold in the middle concertina-wise and are hinged at the top to opposite edges of the roof allowing the side walls and roof to collapse onto the base over the end walls. The base has a pull-out tray or pan and an access door is provided in one of the end walls. Releasable clips are provided to hold the walls and roof together in an elevated position of the structure.
    Type: Grant
    Filed: July 23, 1996
    Date of Patent: May 6, 1997
    Assignee: Woodstream Corporation
    Inventors: William E. Askins, Michael W. Stewart, Gary H. Roulston, Joseph F. Fiore, Jr.
  • Patent number: 5561070
    Abstract: The invention provides phospholipid coated particles capable of specifically binding antiphospholipid antibodies and a method for preparing such particles. Methods are also provided for determining antiphospholipid antibodies in a serum or plasma. Also provided are methods for isolating antiphospholipid antibodies from a fluid and for raising specific antiphospholipid antibodies.
    Type: Grant
    Filed: September 30, 1993
    Date of Patent: October 1, 1996
    Assignee: University Hospitals Board
    Inventors: Michael W. Stewart, Philip A. Gordon, Wai S. Etches
  • Patent number: 5549073
    Abstract: A collapsible cage for dogs or rabbits has a rectangular base, fold-down end walls folding side walls and a roof. The walls and roof are made of metal grids. The end walls fold down onto the base one over the other. The side walls fold in the middle concertina-wise and are hinged at the top to opposite edges of the roof allowing the side walls and roof to collapse onto the base over the end walls. The base has a pull-out tray or pan and an access door is provided in one of the end walls. Releasable clips are provided to hold the walls and roof together in an elevated position of the structure.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: August 27, 1996
    Assignee: Woodstream Corporation
    Inventors: William E. Askins, Michael W. Stewart, Gary Roulston, Joseph F. Fiore, Jr.
  • Patent number: 5427913
    Abstract: The invention provides a method for determining platelet function in a mammal comprising providing platelets from the mammal, contacting the platelets in suspension with at least one immobilised ECM protein or an effective fragment or analog thereof while applying to the platelets an effective mechanical stimulus for an effective period of time and determining the platelet activation produced.The invention also provides a method for detecting a bleeding disorder in a human. Further, the invention provides a method for monitoring the efficacy of pharmacological agents affecting platelet function in vivo.
    Type: Grant
    Filed: December 3, 1992
    Date of Patent: June 27, 1995
    Assignee: Alberta Cancer Board
    Inventors: Andrew R. E. Shaw, Michael W. Stewart
  • Patent number: D283758
    Type: Grant
    Filed: May 2, 1983
    Date of Patent: May 13, 1986
    Assignee: Stewart-Johnson, Inc.
    Inventors: Michael W. Stewart, Norman P. Johnson
  • Patent number: D331629
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: December 8, 1992
    Inventor: Michael W. Stewart