Patents by Inventor Peter W. Carr

Peter W. Carr 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).

  • Carbon-clad zirconium oxide particles
    Patent number: 5254262
    Abstract: Carbon-clad zirconium oxide particles are disclosed which are useful in sorbent applications, particularly as packing materials for High Performance Liquid Chromatography (HPLC). A method for the preparation of chromatographic support material is also disclosed which utilizes low pressure.
    Type: Grant
    Filed: January 15, 1993
    Date of Patent: October 19, 1993
    Assignee: Regents of the University of Minnesota
    Inventors: Eric F. Funkenbusch, Peter W. Carr, Douglas A. Hanggi, Thomas P. Weber
  • High stability porous zirconium oxide spherules
    Patent number: 5205929
    Abstract: The present invention provides a stable stationary phase for chromatography which comprises porous ZrO.sub.2 spherules coated with a cross-linked polymer coating wherein said coated spherules have a pore size from about 20-500 .ANG. and a particle diameter range of about 0.5-500 microns, and are stable in basic media to pHs of up to about 14.
    Type: Grant
    Filed: May 28, 1992
    Date of Patent: April 27, 1993
    Assignee: Regents of the University of Minnesota
    Inventors: Peter W. Carr, Eric F. Funkenbusch, Martin P. Rigney, Patrick L. Coleman, Douglas A. Hanggi, Wes A. Schafer
  • Polymer-coated carbon-clad inorganic oxide particles
    Patent number: 5182016
    Abstract: Polymer-coated carbon-clad inorganic oxide particles are disclosed which are useful in sorbent applications, particularly as packing materials for High Performance Liquid Chromatography (HPLC). A method for the preparation of a chromatographic support material is also disclosed which comprises coating carbon-clad inorganic oxide particles with a monomer or oligomer and cross-linking the monomer or oligomer.
    Type: Grant
    Filed: September 18, 1991
    Date of Patent: January 26, 1993
    Assignee: Regents of the University of Minnesota
    Inventors: Eric F. Funkenbusch, Peter W. Carr, Douglas A. Hahggi, Thomas P. Weber
  • High stability porous zirconium oxide spherules
    Patent number: 5141634
    Abstract: The present invention provides a stable stationary phase for chromatography which comprises porous ZrO.sub.2 spherules coated with a cross-linked polymer coating wherein said coated spherules have a pore size from about 20-500 .ANG. and a particle diameter range of about 0.5-500 microns, and are stable in basic media to pHs of up to about 14.
    Type: Grant
    Filed: February 12, 1991
    Date of Patent: August 25, 1992
    Assignee: Regents of the University of Minnesota
    Inventors: Peter W. Carr, Eric F. Funkenbusch, Martin P. Rigney, Patrick L. Coleman, Douglas A. Hanggi, Wes A. Schafer
  • Carbon-clad zirconium oxide particles
    Patent number: 5108597
    Abstract: Carbon-clad zirconium oxide particles are disclosed which are useful in sorbent applications, particularly as packing materials for High Performance Liquid Chromatography (HPLC). A method for the preparation of chromatographic support material is also disclosed which utilizes low pressure.
    Type: Grant
    Filed: March 22, 1990
    Date of Patent: April 28, 1992
    Assignee: Regents of the University of Minnesota
    Inventors: Eric F. Funkenbusch, Peter W. Carr, Douglas A. Hanggi, Thomas P. Weber
  • High stability porous zirconium oxide spherules
    Patent number: 5015373
    Abstract: The present invention provides a stable stationary phase for chromatography which comprises porous ZrO.sub.2 spherules coated with a cross-linked polymer coating wherein said coated spherules have a pore size from about 20-500 .ANG. and a particle diameter range of about 0.5-500 microns, and are stable in basic media to pHs of up to about 14.
    Type: Grant
    Filed: October 11, 1989
    Date of Patent: May 14, 1991
    Assignee: Regents of the University of Minnesota
    Inventors: Peter W. Carr, Eric F. Funkenbusch, Martin P. Rigney, Patrick L. Coleman, Douglas A. Hanggi, Wes A. Schafer
  • Composite chromatographic article
    Patent number: 4810381
    Abstract: A composite chromatographic article comprising:(a) a polytetrafluoroethylene fibril matrix, and(b) non-swellable sorptive particles enmeshed in said matrix, the ration of non-swellable sorptive particles to polytetrafluoroethylene being in the range of 19:1 to 4:1 by weight, said composite article having a net surface energy in the range of 20 to 300 milliNewtons per meter.
    Type: Grant
    Filed: December 28, 1987
    Date of Patent: March 7, 1989
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Donald F. Hagen, Steven J. St. Mary, Louis A. Errede, Peter W. Carr