Patents by Inventor Ahmet Celikkaya

Ahmet Celikkaya 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).

  • 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
  • Microwave sintering of sol-gel derived abrasive grain
    Patent number: 5653775
    Abstract: A method is provided for making microwave-sintered, free flowing alpha alumina-based ceramic abrasive grain, under conditions effective to couple microwaves with calcined alpha alumina-based abrasive gain precursor and sinter it at a temperature of at least about 1150.degree. C.
    Type: Grant
    Filed: January 26, 1996
    Date of Patent: August 5, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Ross Plovnick, Ahmet Celikkaya, Rodger D. Blake
  • Method of making alumina abrasive grain having a metal nitride coating thereon
    Patent number: 5641330
    Abstract: Method for providing alpha alumina-based abrasive grain having metal nitride on at least a portion of the outer surface thereof. The abrasive grain can be incorporated into a variety of abrasive products including bonded abrasive, nonwoven abrasive, and coated abrasive products.
    Type: Grant
    Filed: November 28, 1995
    Date of Patent: June 24, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Ahmet Celikkaya, Gregory D. Allen
  • Method of making alumina abrasive grain having a metal carbide coating thereon
    Patent number: 5628806
    Abstract: Method for providing alpha alumina-based abrasive grain having metal carbide on at least a portion of the outer surface thereof. The abrasive grain can be incorporated into a variety of abrasive products including bonded abrasive, nonwoven abrasive, and coated abrasive products.
    Type: Grant
    Filed: November 22, 1995
    Date of Patent: May 13, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Ahmet Celikkaya, Gregory D. Allen
  • Method of making alumina abrasive grain having a metal boride coating thereon
    Patent number: 5611828
    Abstract: Method for providing an alpha alumina-based abrasive grain having metal boride on at least a portion of the outer surface thereof. The abrasive grain can be incorporated into a variety of abrasive products including bonded abrasive, nonwoven abrasive, and coated abrasive products.
    Type: Grant
    Filed: November 28, 1995
    Date of Patent: March 18, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Ahmet Celikkaya
  • Abrasive grain with metal oxide coating, method of making same and abrasive products
    Patent number: 5474583
    Abstract: A method of preparing preferred abrasive grain material is provided. The method involves steps of coating a non-sintered aluminum base particles with a metal alkoxide containing coating; heating to convert the coating to a metal oxide coating; and then sinter the base particles to provide sintered particles having an alpha-alumina-based core with an autogenously bonded metal oxide coating. The invention also concerns improved abrasive grain materials and abrasive products including the improved abrasive grain materials therein.
    Type: Grant
    Filed: March 11, 1994
    Date of Patent: December 12, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Ahmet Celikkaya
  • Abrasive grain, method of making same and abrasive products
    Patent number: 5352254
    Abstract: An abrasive grain having a coating of grinding aid thereon is provided. The abrasive grains can be incorporated into a variety of abrasive products including bonded abrasives, nonwoven abrasives and coated abrasives.
    Type: Grant
    Filed: May 20, 1993
    Date of Patent: October 4, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Ahmet Celikkaya
  • Abrasive grain, method of making same and abrasive products
    Patent number: 5213591
    Abstract: An improved abrasive grain comprising the sintered product of a porous non-sintered particle having a coating of inorganic material thereon is provided. A preferred method of making such abrasive grains comprises coating the porous base particles with inorganic particles. The preferred step of coating comprises a step of mixing the base particles with a suspension containing the inorganic particles in a carrier fluid. The porous base particles having the coating of inorganic particles thereon are sintered, to generate the ceramic abrasive grain product. The abrasive grains may be incorporated, to advantage, in a variety of abrasive products including for example bonded abrasives, nonwoven abrasive products and coated abrasive products.
    Type: Grant
    Filed: July 28, 1992
    Date of Patent: May 25, 1993
    Inventors: Ahmet Celikkaya, Jerald A. Scherger, Vernon M. Wald
  • Method for preparing superconductors ceramic composition
    Patent number: 4906608
    Abstract: A process of forming superconductor ceramic oxides from a melt of barium hydroxide and a copper salt selected from copper nitrate and copper acetate.
    Type: Grant
    Filed: December 28, 1987
    Date of Patent: March 6, 1990
    Assignee: Iowa State University Research Foundation
    Inventors: Mufit Akinc, Ahmet Celikkaya