Patents by Inventor Robert D Torgerson

Robert D Torgerson 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: 6869800
    Abstract: An instrument comprising a housing (30) having a fluid-tight seal and a probe (10), adapted to carry a catalyst or sorbent (37), for monitoring a process fluid stream or the behavior of a catalyst or sorbent placed therein. The use of such an instrument permits investigation of catalyst or sorbent behavior in process fluid streams without the need for process shut down or construction of separate process equipment.
    Type: Grant
    Filed: January 10, 2002
    Date of Patent: March 22, 2005
    Assignee: Imperial Chemical Industries PLC
    Inventors: Robert D Torgerson, Peter E J Abbott
  • Patent number: 6454787
    Abstract: A hemostatic device formed of collagen particles and methods for producing and using the hemostatic device to control bleeding are provided. The collagen particles of the hemostatic device have a hemostatic activity that is equivalent to the hemostatic activity of the collagen particles from which the hemostatic device is formed. More preferably, the hemostatic devices are formed of Avitene® flour and the collagen particles of the hemostatic devices of the invention have a hemostatic activity equivalent to the hemostatic activity of Avitene® flour. The hemostatic devices optionally include hemostatic agents and/or therapeutic agents, to further promote hemostasis and wound healing.
    Type: Grant
    Filed: December 11, 1998
    Date of Patent: September 24, 2002
    Assignee: C. R. Bard, Inc.
    Inventors: Francis B. Maddalo, Mark V. Iampietro, Stephen N. Eldridge, Robert D. Torgerson
  • Publication number: 20020103503
    Abstract: A collagen fiber and methods for producing and using the collagen fiber of the inventions to prepare hemostatic fabrics to control bleeding are provided. The collagen particles (e.g., fibrils) of the fiber, preferably, have a hemostatic activity that is equivalent to the hemostatic activity of the collagen particles from which the fiber is formed. The collagen fibers of the invention and hemostatic fabrics formed thereof optionally include hemostatic agents and/or other therapeutic agents, to further promote hemostasis and wound healing.
    Type: Application
    Filed: March 1, 2002
    Publication date: August 1, 2002
    Inventors: Robert D. Torgerson, John Uhoch, Francis B. Maddalo, Stephen N. Eldridge
  • Publication number: 20020059842
    Abstract: An instrument comprising a housing (30) having a fluid-tight seal and a probe (10), adapted to carry a catalyst or sorbent (37), for monitoring a process fluid stream or the behavior of a catalyst or sorbent placed therein. The use of such an instrument permits investigation of catalyst or sorbent behavior in process fluid streams without the need for process shut down or construction of separate process equipment.
    Type: Application
    Filed: January 10, 2002
    Publication date: May 23, 2002
    Inventors: Robert D. Torgerson, Peter E. J. Abbott
  • Patent number: 6361551
    Abstract: A collagen fiber and methods for producing and using the collagen fiber of the inventions to prepare hemostatic fabrics to control bleeding are provided. The collagen particles (e.g., fibrils) of the fiber, preferably, have a hemostatic activity that is equivalent to the hemostatic activity of the collagen particles from which the fiber is formed. The collagen fibers of the invention and hemostatic fabrics formed thereof optionally include hemostatic agents and/or other therapeutic agents, to further promote hemostasis and wound healing.
    Type: Grant
    Filed: December 11, 1998
    Date of Patent: March 26, 2002
    Assignee: C. R. Bard, Inc.
    Inventors: Robert D. Torgerson, John Uhoch, Francis B. Maddalo, Stephen N. Eldridge
  • Patent number: 5876421
    Abstract: A method for removing residual xylene from sutures includes contacting the suture with water either subjecting the suture to an atmosphere containing water vapor or be immersing the suture in liquid water, followed by drying the suture.
    Type: Grant
    Filed: March 25, 1997
    Date of Patent: March 2, 1999
    Inventors: Robert D. Torgerson, Ross R. Muth
  • Patent number: 5697976
    Abstract: A porous bioabsorbable surgical implant material is prepared by coating particles of bioabsorbable polymer with tissue ingrowth promoter. Typical bioabsorbable polymers include polymers of glycolide, lactide, caprolactone, trimethylene carbonate, dioxanone, and physical and chemical combinations thereof. The tissue ingrowth promoter can include calcium hydroxide and/or a hydrophilic coating material. The hydrophilic coating material can be bioabsorbable or non-bioabsorbable. A typical non-bioabsorbable hydrophilic coating material is polyhydroxyethyl methacrylate (PHEMA). The bioabsorbable implant material may also contain a therapeutic agent. Typical therapeutic agents include an antimicrobial agent, dye, growth factors and combinations thereof.
    Type: Grant
    Filed: September 14, 1994
    Date of Patent: December 16, 1997
    Assignee: United States Surgical Corporation
    Inventors: Michael P. Chesterfield, Robert D. Torgerson
  • Patent number: 5658516
    Abstract: Flexible prosthetic implants for repairing, replacing or augmenting hard tissue or bone. The flexible implant comprises a plurality of segments that are connected by flexible retainers which enable the segments to be re-oriented in relation to one another to accommodate the contour, size and shape of the body part being treated. A method for making such flexible prosthetic implants is also disclosed.
    Type: Grant
    Filed: May 18, 1995
    Date of Patent: August 19, 1997
    Assignee: United States Surgical Corporation
    Inventors: Barry Eppley, Thomas Sander, Robert D. Torgerson
  • Patent number: 5496371
    Abstract: Flexible prosthetic implants for repairing, replacing or augmenting hard tissue or bone. The flexible implant comprises a plurality of segments that are connected by flexible retainers which enable the segments to be re-oriented in relation to one another to accommodate the contour, size and shape of the body part being treated. A method for making such flexible prosthetic implants is also disclosed.
    Type: Grant
    Filed: June 1, 1993
    Date of Patent: March 5, 1996
    Assignee: United States Surgical Corporation
    Inventors: Barry Eppley, Thomas Sander, Robert D. Torgerson
  • Patent number: 5366756
    Abstract: A porous bioabsorbable surgical implant material is prepared by coating particles of bioabsorbable polymer with a tissue ingrowth promoter. Typical polymers include polymers of glycolide, lactide, caprolactone, trimethylene carbonate, dioxanone and physical and chemical combinations thereof. The tissue ingrowth promoter can include calcium hydroxide and/or a hydrophillic coating material. The hydrophillic coating material can be bioabsorbable or non-bioabsorbable. A typical non-bioabsorbable hydrophillic coating material is polyhydroxymethylmethacrylate (PHEMA). The bioabsorbable implant material may also contain a therapeutic agent. Typical therapeutic agents include an antimicrobial agent, dye, growth factor and combinations thereof. Typically, the particles are prepared by rotary atomization and coated by spraying.
    Type: Grant
    Filed: June 15, 1992
    Date of Patent: November 22, 1994
    Assignee: United States Surgical Corporation
    Inventors: Michael P. Chesterfield, Robert D. Torgerson
  • Patent number: 5037445
    Abstract: A vacuum bag method for in-situ molding of surgical implants. The method comprises creating an implant precursor material composed of an aggregation of polymer beads coated with a hydrophilic monomer dispersion. A flexible bag containing the implant precursor is molded in-situ to a desired specific shape, and the implant precursor is then rigidified by applying a vacuum to the interior of the bag. The implant precursor is cured by heating to form a unitary porous prosthesis which may be implanted into body tissue to remedy bone defects.
    Type: Grant
    Filed: April 14, 1989
    Date of Patent: August 6, 1991
    Assignee: United States Surgical Corporation
    Inventors: Thomas Sander, Robert D. Torgerson