Patents by Inventor David A. Knaack

David A. Knaack 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).

  • Polyurethanes for osteoimplants
    Patent number: 9327052
    Abstract: Biological-based polyurethanes and methods of making the same. The polyurethanes are formed by reacting a biodegradable polyisocyanate (such as lysine diisocyanate) with an optionally hydroxylated biomolecule to form polyurethane. The polymers formed may be combined with ceramic and/or bone particles to form a composite, which may be used as an osteoimplant.
    Type: Grant
    Filed: April 22, 2013
    Date of Patent: May 3, 2016
    Assignee: Warsaw Orthopedic, Inc.
    Inventors: David A. Knaack, John Winterbottom, David R. Kaes, Todd M. Boyce, Lawrence A. Shimp
  • Hemostatic bone graft
    Patent number: 8545864
    Abstract: The present invention provides a hemostatic bone graft product and method. Hemostatic bone grafts may include demineralized bone matrix in combination with additives. In one embodiment, the graft comprises demineralized bone and polyethylene glycol. Methods for producing the hemostatic bone graft may include mixing demineralized bone with additives to facilitate protein precipitation, surface tension reduction in blood, and/or a cytolytic effect on cells at a bleeding site.
    Type: Grant
    Filed: July 5, 2007
    Date of Patent: October 1, 2013
    Assignee: Warsaw Orthopedic, Inc.
    Inventors: John W. Morris, David A. Knaack, Lawrence A. Shimp, Keyvan Behnam, Robert P. Skinner, Randal R. Betz
  • POLYURETHANES FOR OSTEOIMPLANTS
    Publication number: 20130236547
    Abstract: Biological-based polyurethanes and methods of making the same. The polyurethanes are formed by reacting a biodegradable polyisocyanate (such as lysine diisocyanate) with an optionally hydroxylated biomolecule to form polyurethane. The polymers formed may be combined with ceramic and/or bone particles to form a composite, which may be used as an osteoimplant.
    Type: Application
    Filed: April 22, 2013
    Publication date: September 12, 2013
    Applicant: Warsaw Orthopedic, Inc. Orthopedic, Inc.
    Inventors: David A. Knaack, John Winterbottom, David R. Kaes, Todd M. Boyce, Lawrence A. Shimp
  • Polyurethanes for osteoimplants
    Patent number: 8425893
    Abstract: Biological-based polyurethanes and methods of making the same. The polyurethanes are formed by reacting a biodegradable polyisocyanate (such as lysine diisocyanate) with an optionally hydroxylated biomolecule to form polyurethane. The polymers formed may be combined with ceramic and/or bone particles to form a composite, which may be used as an osteoimplant.
    Type: Grant
    Filed: July 13, 2011
    Date of Patent: April 23, 2013
    Assignee: Warsaw Orthopedic, Inc.
    Inventors: David A. Knaack, John Winterbottom, David R. Kaes, Todd M. Boyce, Lawrence A. Shimp