Patents by Inventor Darren T. Castro

Darren T. Castro 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).

  • Polycrystalline translucent alumina-based ceramic material, uses, and methods
    Patent number: 6878456
    Abstract: A polycrystalline translucent aluminum oxide ceramic material having an average grain size of no greater than 1.0 micron and a Contrast Ratio value of less than about 0.7. The material can be in the form of a dental mill blank, dental prosthesis or other dental article or non-dental article.
    Type: Grant
    Filed: December 28, 2001
    Date of Patent: April 12, 2005
    Assignee: 3M Innovative Properties Co.
    Inventors: Darren T. Castro, Richard P. Rusin
  • Abrasive particles containing sintered, polycrystalline zirconia
    Patent number: 6749653
    Abstract: Abrasive particles and methods of making abrasive particles are disclosed. The abrasive particles may be incorporated into a variety of abrasive articles, including bonded abrasives, coated abrasives, nonwoven abrasives, and abrasive brushes.
    Type: Grant
    Filed: February 21, 2002
    Date of Patent: June 15, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Darren T. Castro, Vincent W. Nehring, Anatoly Z. Rosenflanz, Thomas E. Wood
  • Orthodontic appliances including polycrystalline alumina-based ceramic material, kits, and methods
    Patent number: 6648638
    Abstract: An orthodontic appliance that includes a polycrystalline translucent aluminum oxide ceramic material having an average grain size of no greater than 1.0 micron and a Contrast Ratio value of less than about 0.7.
    Type: Grant
    Filed: December 28, 2001
    Date of Patent: November 18, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: Darren T. Castro, Richard P. Rusin, William E. Wyllie, II
  • Abrasive particles containing sintered, polycrystalline zirconia
    Publication number: 20030172594
    Abstract: Abrasive particles and methods of making abrasive particles are disclosed. The abrasive particles may be incorporated into a variety of abrasive articles, including bonded abrasives, coated abrasives, nonwoven abrasives, and abrasive brushes.
    Type: Application
    Filed: February 21, 2002
    Publication date: September 18, 2003
    Applicant: 3M Innovative Properties Company
    Inventors: Darren T. Castro, Vincent W. Nehring, Anatoly Z. Rosenflanz, Thomas E. Wood
  • ORTHODONTIC APPLIANCES INCLUDING POLYCRYSTALLINE ALUMINA-BASED CERAMIC MATERIAL, KITS, AND METHODS
    Publication number: 20030165790
    Abstract: An orthodontic appliance that includes a polycrystalline translucent aluminum oxide ceramic material having an average grain size of no greater than 1.0 micron and a Contrast Ratio value of less than about 0.7.
    Type: Application
    Filed: December 28, 2001
    Publication date: September 4, 2003
    Applicant: 3M Innovative Properties Company
    Inventors: Darren T. Castro, Richard P. Rusin, William E. Wyllie
  • Polycrystalline translucent alumina-based ceramic material, uses, and methods
    Publication number: 20030125189
    Abstract: A polycrystalline translucent aluminum oxide ceramic material having an average grain size of no greater than 1.0 micron and a Contrast Ratio value of less than about 0.7. The material can be in the form of a dental mill blank, dental prosthesis or other dental article or non-dental article.
    Type: Application
    Filed: December 28, 2001
    Publication date: July 3, 2003
    Applicant: 3M Innovative Properties Company
    Inventors: Darren T. Castro, Richard P. Rusin
  • Abrasive grain, abrasive articles, and methods of making and using the same
    Patent number: 6277161
    Abstract: Alpha alumina-based abrasive grain. The abrasive grain can be incorporated into abrasive products such as coated abrasives, bonded abrasives, non-woven abrasives, and abrasive brushes.
    Type: Grant
    Filed: September 28, 1999
    Date of Patent: August 21, 2001
    Assignee: 3M Innovative Properties Company
    Inventors: Darren T. Castro, Ahmet Celikkaya, Larry D. Monroe