Patents by Inventor Leonard J. Litkowski

Leonard J. Litkowski 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).

  • Methods and compositions for whitening teeth
    Patent number: 6365132
    Abstract: Methods for whitening teeth including contacting teeth with an effective amount of particulate bioactive glass are disclosed.
    Type: Grant
    Filed: March 17, 2000
    Date of Patent: April 2, 2002
    Assignees: Univ. of MD., Baltimore, USBiomaterials Corp.
    Inventors: Leonard J. Litkowski, Gary D. Hack, David C. Greenspan
  • Compositions containing bioactive glass and their use in treating tooth hypersensitivity
    Patent number: 6338751
    Abstract: A novel silica based bioactive glass composition that can be used in conjunction with a delivery agent such as a toothpaste, gel saliva, etc. having a particle size range <90 &mgr;m which will form a rapid and continuous reaction with body fluids due to the immediate and long term ionic release of Ca and P from the core silica particles, to produce a stable crystalline hydroxy carbonate apatite layer deposited onto and into the dentin tubules for the immediate and long term reduction of dentin hypersensitivity.
    Type: Grant
    Filed: March 31, 1998
    Date of Patent: January 15, 2002
    Assignees: USBiomaterials Corp, University of Maryland, Baltimore
    Inventors: Leonard J. Litkowski, Gary D. Hack, David C. Greenspan
  • Bioactive glass compositions and methods of treatment using bioactive glass
    Patent number: 6244871
    Abstract: A novel silica based bioactive glass composition that can be used in conjunction with a delivery agent such as a toothpaste, gel, etc. having a particle size range <90 &mgr;m which will form a rapid and continuous reaction with body fluids due to the immediate and long term ionic release of Ca and P from the core silica particles, to produce a stable crystalline hydroxy carbonate apatite layer deposited onto and into the dentin tubules for the immediate and long term reduction of dentin hypersensitivity and tooth surface remineralization.
    Type: Grant
    Filed: January 7, 2000
    Date of Patent: June 12, 2001
    Assignee: Univ. of Maryland Baltimore
    Inventors: Leonard J. Litkowski, Gary D. Hack, David C. Greenspan
  • Use of biologically active glass as a drug delivery system
    Patent number: 6197342
    Abstract: This invention relates to a synthetic bone replacement material impregnated with drugs such as antibiotics and growth hormones, which facilitate and promote the regeneration of bone and/or soft tissue. Methods for making the impregnated material and its medical use are also taught.
    Type: Grant
    Filed: September 21, 1998
    Date of Patent: March 6, 2001
    Inventors: Paul D. Thut, Leonard J. Litkowski, David C. Greenspan
  • Use of biogically active glass as a drug delivery system
    Patent number: 6153221
    Abstract: This invention relates to a synthetic bone replacement material impregnated with drugs such as antibiotics and growth hormones, which facilitate and promote the regeneration of bone and/or soft tissue. Methods for making the impregnated material and its medical use are also taught.
    Type: Grant
    Filed: September 21, 1998
    Date of Patent: November 28, 2000
    Assignees: Paul D. Thut, Leonard J. Litkowski
    Inventors: Paul D. Thut, Leonard J. Litkowski, David C. Greenspan
  • Methods of treatment using bioactive glass
    Patent number: 6086374
    Abstract: A novel silica based bioactive glass composition that can be used in conjunction with a delivery agent such as a toothpaste, gel, etc. having a particle size range <90 .mu.gm which will form a rapid and continuous reaction with body fluids due to the immediate and long term ionic release of Ca and P from the core silica particles, to produce a stable crystalline hydroxy carbonate apatite layer deposited onto and into the dentin tubules for the immediate and long term reduction of dentin hypersensitivity and tooth surface remineralization.
    Type: Grant
    Filed: January 29, 1997
    Date of Patent: July 11, 2000
    Assignee: USBiomaterials Corp.
    Inventors: Leonard J. Litkowski, Gary D. Hack, David C. Greenspan
  • Use of biologically active glass as a drug delivery system
    Patent number: 5972384
    Abstract: This invention relates to a synthetic bone replacement material impregnated with drugs such as antibiotics and growth hormones, which facilitate and promote the regeneration of bone and/or soft tissue. Methods for making the impregnated material and its medical use are also taught.
    Type: Grant
    Filed: October 1, 1997
    Date of Patent: October 26, 1999
    Assignees: University of Maryland, Baltimore, USBiomaterials, Corp.
    Inventors: Paul D. Thut, Leonard J. Litkowski, David C. Greenspan
  • Compositions containing bioactive glass and their use in treating tooth hypersensitivity
    Patent number: 5735942
    Abstract: A novel silica based bioactive glass composition that can be used in conjunction with a delivery agent such as a toothpaste, gel saliva, etc. having a particle size range <90 .mu.m which will form a rapid and continuous reaction with body fluids due to the immediate and long term ionic release of Ca and P from the core silica particles, to produce a stable crystalline hydroxy carbonate apatite layer deposited onto and into the dentin tubules for the immediate and long term reduction of dentin hypersensitivity.
    Type: Grant
    Filed: July 16, 1997
    Date of Patent: April 7, 1998
    Assignees: USBiomaterials Corporation, University of Maryland
    Inventors: Leonard J. Litkowski, Gary D. Hack, David C. Greenspan