Patents Assigned to USBiomaterials Corp.
  • Patent number: 6756060
    Abstract: Compositions and methods for treating wounds to significantly reduce the healing time, reduce the incidence of scar formation, improve the success of skin grafts, reduce the inflammatory response and providing anti-bacterial treatments to a patient in need thereof, that include small non-interlinked particles of bioactive glass or highly porous bioactive glass, are disclosed. Anti-bacterial solutions derived from bioactive glass, and methods of preparation and use thereof, are also disclosed. The compositions include non-interlinked particles of bioactive glass, alone or in combination with anti-bacterial agents and/or anti-inflammatory agents. The compositions can include an appropriate carrier for topical administration. Anti-bacterial properties can be imparted to implanted materials, such as prosthetic implants, sutures, stents, screws, plates, tubes, and the like, by incorporating small bioactive glass particles or porous bioactive glass into or onto the implanted materials.
    Type: Grant
    Filed: April 27, 2000
    Date of Patent: June 29, 2004
    Assignee: USBiomaterials Corp.
    Inventors: David C. Greenspan, Jon K. West, Sean Lee, James L. Meyers, Mason Diamond
  • Patent number: 6663878
    Abstract: Compositions and methods for systemically minimizing the inflammatory effects of TNF-&agr; are disclosed. The compositions include particles of bioactive glass with a particle size less than about 20 &mgr;m, alone or in combination with anti-inflammatory agents and other therapeutic agents. The compositions can include an appropriate carrier for oral, intramuscular, intraperitoneal or intravenous administration. When administered to a patient, the particles bring about elevated levels of IL-6 and do not cause elevated levels of TNF-&agr;.
    Type: Grant
    Filed: April 28, 2000
    Date of Patent: December 16, 2003
    Assignee: USBIOMATERIALS Corp.
    Inventors: David C. Greenspan, Sean Lee, Marlo tan Walpole
  • 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
  • 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
  • Patent number: 6299930
    Abstract: Percutaneous implants are disclosed including a portion implantable into a patient, a dermal bonding region capable of forming a bond between the implant and a dermal layer of the patient after the implantable portion is implanted into the patient, and the dermal bonding region including a substrate with a discontinuous coating of particulate bioactive glass wherein the average spacing between the particles of bioactive glass is predetermined and at least about 20 microns prior to implantation into the patient. Also disclosed are bioactive coatings including a substrate and fibers and/or particles of bioactive glass distributed on the substrate with a predetermined average interfiber distance of at least about 20 microns.
    Type: Grant
    Filed: September 20, 1999
    Date of Patent: October 9, 2001
    Assignees: USBiomaterials Corp., University of Florida Research Foundation, Inc.
    Inventors: James S. Marotta, Guy LaTorre, Christopher Batich, Larry L. Hench
  • Patent number: 6171986
    Abstract: A process for making bioactive glasses is described including preparing a reaction mixture of reactants capable of forming a sol-gel, aging the reaction mixture, near equilibrium drying a gel resulting from the reaction mixture, and heating the -near equilibrium-dried gel described. Also described are near equilibrium-dried bioactive glass compositions.
    Type: Grant
    Filed: January 13, 1998
    Date of Patent: January 9, 2001
    Assignee: USBiomaterials Corp.
    Inventors: Jipin Zhong, David C. Greenspan
  • 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
  • Patent number: 6010713
    Abstract: A process for making bioactive glasses is described including preparing a reaction mixture of reactants capable of forming a sol-gel, aging the reaction mixture, near equilibrium drying a gel resulting from the reaction mixture, and heating the near equilibrium-dried gel described. Also described are near equilibrium-dried bioactive glass compositions.
    Type: Grant
    Filed: January 13, 1998
    Date of Patent: January 4, 2000
    Assignee: USBiomaterials Corp.
    Inventors: Jipin Zhong, David C. Greenspan
  • 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
  • Patent number: 5874101
    Abstract: A process for making bioactive glasses is described including preparing a reaction mixture of reactants capable of forming a sol-gel, aging the reaction mixture, near equilibrium drying a gel resulting from the reaction mixture, and heating the -near equilibrium-dried gel described. Also described are near equilibrium-dried bioactive glass compositions.
    Type: Grant
    Filed: April 14, 1997
    Date of Patent: February 23, 1999
    Assignee: USBiomaterials Corp.
    Inventors: Jipin Zhong, David C. Greenspan