Patents by Inventor Robert G. Visser

Robert G. Visser 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: 6634929
    Abstract: A method of grinding a glass or other workpiece is described comprising the steps of: contacting a grinding layer of a flexible abrasive article with the surface of a glass workpiece, the grinding layer comprising abrasive grit dispersed in a bonding matrix, the matrix attached to a flexible backing; and moving the grinding layer of the flexible abrasive article and the surface of the glass workpiece relative to one another at a velocity of at least about 16.5 meters per second to provide a final surface roughness Ra less than about 0.030 micrometer.
    Type: Grant
    Filed: April 20, 2000
    Date of Patent: October 21, 2003
    Assignee: 3M Innovative Properties Company
    Inventor: Robert G. Visser
  • Patent number: 6231629
    Abstract: An abrasive article is provided which comprises a backing; and at least one three-dimensional abrasive coating comprising diamond particles dispersed within a binder bonded to a surface of the backing, the binder comprising a cured binder precursor including a urethane acrylate oligomer. The abrasive article is capable of rapid glass stock removal coupled with reducing the surface finish as indicated by reduced Ra values using an RPP test procedure.
    Type: Grant
    Filed: September 4, 1998
    Date of Patent: May 15, 2001
    Assignee: 3M Innovative Properties Company
    Inventors: Todd J. Christianson, David D. Nguyen, Robert G. Visser, Soon C. Park
  • Patent number: 6110015
    Abstract: A method for polishing a glass workpiece is provided that includes contacting the glass workpiece having an initial Ra with an abrasive article comprising a three-dimensional abrasive coating bonded to a backing, applying a liquid at an interface between the glass workpiece and the abrasive article; moving the glass workpiece and the abrasive article relative to one another; and reducing the initial Ra to a final Ra. The abrasive articles are capable of rapid removal of glass stock from a glass test blank and reducing the surface finish using an RPP test procedure.
    Type: Grant
    Filed: December 17, 1998
    Date of Patent: August 29, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Todd J. Christianson, Robert G. Visser, David D. Nguyen
  • Patent number: 5910471
    Abstract: An abrasive article is provided which comprises a backing; and at least one three-dimensional abrasive coating comprising diamond particles dispersed within a binder bonded to a surface of the backing, the binder comprising a cured binder precursor including a urethane acrylate oligomer. The abrasive article is capable of rapid glass stock removal coupled with reducing the surface finish as indicated by reduced Ra values using an RPP test procedure.
    Type: Grant
    Filed: March 7, 1997
    Date of Patent: June 8, 1999
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Todd J. Christianson, David D. Nguyen, Robert G. Visser
  • Patent number: 5888119
    Abstract: A method for polishing a glass workpiece is provided that includes contacting the glass workpiece having an initial Ra with an abrasive article comprising a three-dimensional abrasive coating bonded to a backing, applying a liquid at an interface between the glass workpiece and the abrasive article; moving the glass workpiece and the abrasive article relative to one another; and reducing the initial Ra to a final Ra. The abrasive articles are capable of rapid removal of glass stock from a glass test blank and reducing the surface finish using an RPP test procedure.
    Type: Grant
    Filed: March 7, 1997
    Date of Patent: March 30, 1999
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Todd J. Christianson, David D. Nguyen, Robert G. Visser