Patents by Inventor Christopher J. Calhoun

Christopher J. Calhoun 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).

  • Patent number: 8349795
    Abstract: Resorbable lactide polymer thin membranes are disclosed. The thin membranes are constructed of polylactide resorbable polymers, which are engineered to be absorbed into the body relatively slowly over time in order to reduce potential negative side effects. The membranes are formed to have very thin thicknesses, for example, thicknesses between about 0.010 mm and about 0.30 mm. The membranes can be extruded from polylactide polymers having a relatively high viscosity property, can be preshaped with relatively thick portions, and can be stored in sterile packages.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: January 8, 2013
    Assignee: MAST Biosurgery AG
    Inventors: Christopher J. Calhoun, Ralph E. Holmes, Kenneth K. Kleinhenz
  • Publication number: 20120027835
    Abstract: A prosthesis for repairing a hernia includes an adhesion-resistant biodegradable region and an opposing tissue-ingrowth biodegradable region. When the prosthesis is implanted into the patient, the adhesion-resistant biodegradable region covers a fascial defect of the hernia, and the tissue-ingrowth biodegradable region is located above the adhesion-resistant biodegradable region while being exposed substantially only to the hoses subcutaneous tissue layer. This orientation allows the tissue-ingrowth biodegradable region to become firmly incorporated with the host's body tissue. The adhesion-resistant biodegradable region faces the internal organs and decreases the incidence of adhesions and/or bowel obstruction.
    Type: Application
    Filed: October 10, 2011
    Publication date: February 2, 2012
    Inventors: Kai Deusch, Christopher J. Calhoun, Kenton R. Mullins
  • Publication number: 20120010726
    Abstract: Described are devices and methods for reinforcing a layer of living tissue, which when affixed to a tissue layer prior to surgical incision, reinforces the tissue to be incised, provides a fibro-conductive matrix to promote healing in a preferred plane, and provides for a subsequent closure and fluidic seal. A partially or entirely absorbable growth matrix is disclosed, comprising two adhesion-resistant layers enclosing a cellular conductive medium for promoting fibrosis in a preferred plane. The cellular conductive portion is partially or entirely sequestered from surrounding tissue. The device is constructed in a physiologic range of tensile strengths and elasticity suitable for closure of the pericardium, peritoneum, or other typically thin membranes enclosing organs in the body, whose function is to prevent adhesions between tissue surfaces normally in motion.
    Type: Application
    Filed: June 9, 2011
    Publication date: January 12, 2012
    Inventors: Lukas BLUECHER, Michael T. Milbocker, Christopher J. Calhoun
  • Publication number: 20110280917
    Abstract: Resorbable lactide polymer thin membranes are disclosed. The thin membranes are constructed of polylactide resorbable polymers, which are engineered to be absorbed into the body relatively slowly over time in order to reduce potential negative side effects. The membranes are formed to have very thin thicknesses, for example, thicknesses between about 0.010 mm and about 0.30 mm. The membranes can be extruded from polylactide polymers having a relatively high viscosity property, can be preshaped with relatively thick portions, and can be stored in sterile packages.
    Type: Application
    Filed: July 28, 2011
    Publication date: November 17, 2011
    Inventors: Christopher J. Calhoun, Ralph E. Holmes, Kenneth K. Kleinhenz
  • Publication number: 20110274739
    Abstract: Resorbable polymer barrier membranes and methods of their applications are disclosed. In a broad embodiment, methods of governing tissue growth, or preventing tissue growth into a certain spatial area, includes the step of forming a spatial barrier with the present resorbable barrier membrane. The barrier membrane separates a tissue-growth area and a non-bone-growth area, and prevents tissue from growing into the non-growth area.
    Type: Application
    Filed: May 10, 2010
    Publication date: November 10, 2011
    Inventors: Kai Deusch, Christopher J. Calhoun, Kenton R. Mullins
  • Patent number: 8048444
    Abstract: An anti-adhesion membrane is placed onto an implant introduced into a surgical site of a patient to prevent post-surgical adhesions between the implant and surrounding tissue. The implant may comprise either biological material, such as a transplanted organ, or non-biological material such as a medical device. The membrane may be applied in a variety of ways. In one example, a membrane according to the present invention is shrink-wrapped around a pace-maker. In another example, a breast implant is spray-coated or dipped with the membrane material.
    Type: Grant
    Filed: January 11, 2007
    Date of Patent: November 1, 2011
    Assignee: MAST Biosurgery AG
    Inventors: Christopher J. Calhoun, Ralph E. Holmes, G. Bryan Cornwall
  • Patent number: 8012502
    Abstract: Resorbable lactide polymer thin membranes are disclosed. The thin membranes are constructed of polylactide resorbable polymers, which are engineered to be absorbed into the body relatively slowly over time in order to reduce potential negative side effects. The membranes are formed to have very thin thicknesses, for example, thicknesses between about 0.010 mm and about 0.300 mm. The membranes can be extruded from polylactide polymers having a relatively high viscosity property, can be preshaped with relatively thick portions, and can be stored in sterile packages.
    Type: Grant
    Filed: November 9, 2007
    Date of Patent: September 6, 2011
    Assignee: MAST Biosurgery AG
    Inventors: Christopher J. Calhoun, Ralph E. Holmes, Kenneth K. Kleinhenz
  • Patent number: 7947300
    Abstract: Resorbable lactide polymer thin membranes are disclosed. The thin membranes are constructed of polylactide resorbable polymers, which are engineered to be absorbed into the body relatively slowly over time in order to reduce potential negative side effects. The membranes are formed to have very thin thicknesses, for example, thicknesses between about 0.010 mm and about 0.300 mm. The membranes can be extruded from polylactide polymers having a relatively high viscosity property, can be preshaped with relatively thick portions, and can be stored in sterile packages.
    Type: Grant
    Filed: January 16, 2007
    Date of Patent: May 24, 2011
    Assignee: MAST Biosurgery AG
    Inventors: Christopher J. Calhoun, Ralph E. Holmes, Kenneth K. Kleinhenz
  • Publication number: 20100266662
    Abstract: Resorbable polylactide polymer healing membranes and methods of their applications are disclosed. In a broad embodiment, the invention features methods for inducing proper tissue healing after an open heart surgery. In one embodiment, the methods includes a step of forming a patch with a healing membrane over the open pericardium to induce proper tissue healing and placement in other open heart surgery procedures to facilitate re-entry by the surgeon.
    Type: Application
    Filed: April 26, 2010
    Publication date: October 21, 2010
    Inventor: Christopher J. Calhoun
  • Publication number: 20100266663
    Abstract: A prosthesis for repairing a hernia includes an adhesion-resistant biodegradable region and an opposing tissue-ingrowth biodegradable region. When the prosthesis is implanted into the patient, the adhesion-resistant biodegradable region covers a fascial defect of the hernia, and the tissue-ingrowth biodegradable region is located above the adhesion-resistant biodegradable region while being exposed substantially only to the host's subcutaneous tissue layer. This orientation allows the tissue-ingrowth biodegradable region to become firmly incorporated with the host's body tissue. The adhesion-resistant biodegradable region faces the internal organs and decreases the incidence of adhesions and/or bowel obstruction.
    Type: Application
    Filed: April 26, 2010
    Publication date: October 21, 2010
    Inventors: Christopher J. Calhoun, Lukas Bluecher
  • Patent number: 7767222
    Abstract: An anti-adhesion membrane is placed onto an implant introduced into a surgical site of a patient to prevent post-surgical adhesions between the implant and surrounding tissue. The implant may comprise either biological material, whcu as a transplanted organ, or non-biological material such as a medical device. The membrane may be applied in a variety of ways. In one example, a membrane according to the present invention is shrink-wrapped around a pace-maker. In another example, a breast implant is spray-coated or dipped with the membrane material.
    Type: Grant
    Filed: July 31, 2003
    Date of Patent: August 3, 2010
    Assignee: MAST Biosurgery AG
    Inventors: Christopher J. Calhoun, Ralph E. Holmes, G. Bryan Cornwall
  • Patent number: 7744915
    Abstract: An anti-adhesion membrane is placed onto an implant introduced into a surgical site of a patient to prevent post-surgical adhesions between the implant and surrounding tissue. The implant may comprise either biological material, such as a transplanted organ, or non-biological material such as a medical device. The membrane may be applied in a variety of ways. In one example, a membrane according to the present invention is shrink-wrapped around a pace-maker. In another example, a breast implant is spray-coated or dipped with the membrane material.
    Type: Grant
    Filed: January 12, 2007
    Date of Patent: June 29, 2010
    Assignee: MAST Biosurgery AG
    Inventors: Christopher J. Calhoun, Ralph E. Holmes, G. Bryan Cornwall
  • Patent number: 7704520
    Abstract: Resorbable polylactide polymer healing membranes and methods of their applications are disclosed. In a broad embodiment, the invention features methods for inducing proper tissue healing after an open heart surgery. In one embodiment, the methods includes a step of forming a patch with a healing membrane over the open pericardium to induce proper tissue healing and placement in other open heart surgery procedures to facilitate re-entry by the surgeon.
    Type: Grant
    Filed: September 10, 2003
    Date of Patent: April 27, 2010
    Assignee: MAST Biosurgery AG
    Inventor: Christopher J. Calhoun
  • Publication number: 20090288753
    Abstract: An anti-adhesion membrane is placed onto an implant introduced into a surgical site of a patient to prevent post-surgical adhesions between the implant and surrounding tissue. The implant may comprise either biological material, such as a transplanted organ, or non-biological material such as a medical device. The membrane may be applied in a variety of ways. In one example, a membrane according to the present invention is shrink-wrapped around a pace-maker. In another example, a breast implant is spray-coated or dipped with the membrane material.
    Type: Application
    Filed: July 29, 2009
    Publication date: November 26, 2009
    Inventors: Christopher J. Calhoun, Ralph E. Homes, G. Bryan Comwall
  • Patent number: 7592017
    Abstract: Resorbable lactide polymer thin membranes are disclosed. The thin membranes are constructed of polylactide resorbable polymers, which are engineered to be absorbed into the body relatively slowly over time in order to reduce potential negative side effects. The membranes are formed to have very thin thicknesses, for example, thicknesses between about 0.010 mm and about 0.300 mm. The membranes can be extruded from polylactide polymers having a relatively high viscosity property, can be preshaped with relatively thick portions, and can be stored in sterile packages.
    Type: Grant
    Filed: July 31, 2003
    Date of Patent: September 22, 2009
    Assignee: MAST Biosurgery AG
    Inventors: Christopher J. Calhoun, Ralph E. Holmes, Kenneth K. Kleinhenz
  • Patent number: 7537782
    Abstract: Resorbable polymer barrier membranes and methods of their applications are disclosed. In a broad embodiment, methods of governing bone growth, or preventing bone growth into a certain spatial area, includes the step of forming a spatial barrier with the present resorbable barrier membrane. The barrier membrane separates a bone-growth area and a non-bone-growth area, and prevents bone from growing into the non-growth area.
    Type: Grant
    Filed: February 27, 2003
    Date of Patent: May 26, 2009
    Assignee: Kensey Nash Corporation
    Inventors: Christopher J. Calhoun, G. Bryan Cornwall
  • Publication number: 20080119878
    Abstract: A prosthesis for repairing a hernia includes an adhesion-resistant biodegradable region and an opposing tissue-ingrowth biodegradable region. When the prosthesis is implanted into the patient, the adhesion-resistant biodegradable region covers a fascial defect of the hernia, and the tissue-ingrowth biodegradable region is located above the adhesion-resistant biodegradable region while being exposed substantially only to the host's subcutaneous tissue layer. This orientation allows the tissue-ingrowth biodegradable region to become firmly incorporated with the host's body tissue. The adhesion-resistant biodegradable region faces the internal organs and decreases the incidence of adhesions and/or bowel obstruction.
    Type: Application
    Filed: December 5, 2007
    Publication date: May 22, 2008
    Inventors: Kai Deusch, Christopher J. Calhoun, Kenton R. Mullins
  • Publication number: 20080119877
    Abstract: A prosthesis for repairing a hernia includes an adhesion-resistant biodegradable region and an opposing tissue-ingrowth biodegradable region. When the prosthesis is implanted into the patient, the adhesion-resistant biodegradable region covers a fascial defect of the hernia, and the tissue-ingrowth biodegradable region is located above the adhesion-resistant biodegradable region while being exposed substantially only to the host's subcutaneous tissue layer. This orientation allows the tissue-ingrowth biodegradable region to become firmly incorporated with the host's body tissue. The adhesion-resistant biodegradable region faces the internal organs and decreases the incidence of adhesions and/or bowel obstruction.
    Type: Application
    Filed: December 5, 2007
    Publication date: May 22, 2008
    Inventors: Kai Deusch, Christopher J. Calhoun, Kenton R. Mullins
  • Patent number: 7104994
    Abstract: A method, apparatus and system for applying bio-resorbable membranes or plates to bone for internal fixation of bone defects is disclosed.
    Type: Grant
    Filed: October 5, 2000
    Date of Patent: September 12, 2006
    Assignee: Cytori Therapeutics, Inc.
    Inventors: James Peter Amis, Christopher J. Calhoun
  • Publication number: 20040137033
    Abstract: Resorbable lactide polymer thin membranes are disclosed. The thin membranes are constructed of polylactide resorbable polymers, which are engineered to be absorbed into the body relatively slowly over time in order to reduce potential negative side effects. The membranes are formed to have very thin thicknesses, for example, thicknesses between about 0.010 mm and about 0.300 mm. The membranes can be extruded from polylactide polymers having a relatively high viscosity property, can be preshaped with relatively thick portions, and can be stored in sterile packages.
    Type: Application
    Filed: July 31, 2003
    Publication date: July 15, 2004
    Inventors: Christopher J. Calhoun, Ralph E. Holmes, Kenneth K. Kleinhenz