Patents by Inventor Carole J. Markhoff-Matheny

Carole J. Markhoff-Matheny 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).

  • High porosity vitrified bonded grinding wheels
    Patent number: 5203886
    Abstract: Vitrified bonded abrasive bodies prepared from sol-gel sintered aluminous grit particles, a vitreous bond, bubbled alumina, and a sacrificial organic material exhibit improved abrasive performance, especially for creepfeed grinding products.
    Type: Grant
    Filed: August 12, 1991
    Date of Patent: April 20, 1993
    Assignee: Norton Company
    Inventors: David A. Sheldon, Carole J. Markhoff-Matheny, Renato Terragni
  • Vitrified bonded sol gel sintered aluminous abrasive bodies
    Patent number: 5131923
    Abstract: Vitrified bonded abrasive bodies prepared from sol gel sintered aluminous grit particles and a vitreous (glass) bond exhibit improved abrasive performance by treating the surfaces of the grit particles so as to give them silica-enriched surfaces.
    Type: Grant
    Filed: June 11, 1990
    Date of Patent: July 21, 1992
    Assignee: Norton Company
    Inventors: Carole J. Markhoff-Matheny, John Hay, David Rostoker
  • Vitrified bonded finely milled sol gel aluminous bodies
    Patent number: 5131926
    Abstract: Vitrified bonded abrasive bodies prepared from sol-gel sintered aluminous grit particles and a vitreous (glass) bond exhibit improved abrasive performance by coating the surfaces of the grit particles with a metal oxide, preferably by means of an organofunctional metal-containing surfactant having a metal content of at least about 10 weight percent.
    Type: Grant
    Filed: March 15, 1991
    Date of Patent: July 21, 1992
    Assignee: Norton Company
    Inventors: David Rostoker, Carole J. Markhoff-Matheny
  • Nitrified bonded sol gel sintered aluminous abrasive bodies
    Patent number: 4997461
    Abstract: Vitrified bonded abrasive bodies prepared from sol gel sintered aluminous grit particles and a vitreous (glass) bond exhibit improved abrasive performance by treating the surfaces of the grit particles so as to give them silica-enriched surfaces.
    Type: Grant
    Filed: September 11, 1989
    Date of Patent: March 5, 1991
    Assignee: Norton Company
    Inventors: Carole J. Markhoff-Matheny, John Hay, David Rostoker
  • Frit bonded abrasive wheel
    Patent number: 4898597
    Abstract: A grinding wheel is disclosed which is made up of sintered aluminous abrasive and a vitrified bond, the vitrified bond being a frit. A large portion of the sintered aluminous abrasive may be replaced by a non-sintered abrasive and the bond may include fillers and/or grinding aids.
    Type: Grant
    Filed: August 25, 1988
    Date of Patent: February 6, 1990
    Assignee: Norton Company
    Inventors: John Hay, Carole J. Markhoff-Matheny, Brian E. Swanson