Patents Assigned to Polymer Group, Inc.
  • Patent number: 7931457
    Abstract: An apparatus for producing sub-micron fibers, and more specifically an apparatus for effecting formation of sub-micron fibers by fibrillation of polymer films, and nonwoven materials and articles incorporating them.
    Type: Grant
    Filed: November 23, 2009
    Date of Patent: April 26, 2011
    Assignee: Polymer Group, Inc.
    Inventors: Michael H. Johnson, Timothy Krause, Michael W. Hayes, Rajeev Chhabra, Savas Aydore, Olaf Erik Alexander Isele, Han Xu
  • Patent number: 7928025
    Abstract: Thermal compression moldable nonwoven multilayered fibrous batts having substantially uniform density are provided, which are useful, for example, for fabrication of multi-density molded parts, such as multi-density molded vehicle liners. The nonwoven multilayered fibrous batts of uniform density comprising needle-punched first and second (and optionally third and/or fourth) fibrous batt layers formed with different fiber blends, wherein the multilayered batt can be molded into acoustical parts having multi-densities.
    Type: Grant
    Filed: October 1, 2008
    Date of Patent: April 19, 2011
    Assignee: Polymer Group, Inc.
    Inventors: Gale Shipley, Anna Jean Sill, Stephen Foss
  • Patent number: 7915184
    Abstract: The present invention is directed to a nonwoven anti-microbial hard surface wipe, and more specifically to an anti-microbial hard surface wipe that more readily releases a disinfectant or anti-microbial agent. In a first embodiment, the nonwoven substrate of the present invention is comprised of a non-ionic binder, as well as a cationic disinfectant. The wipe is introduced into a water source and the disinfectant is readily released from the wipe so as to form a disinfectant solution. In a second embodiment, the nonwoven substrate of the present invention is comprised of a non-ionic binder and used along with a separate commercially available disinfecting or sanitizing solution. The disinfecting solution is preferably a cationic disinfecting solution, such as a cationic dual quaternary sanitizing system.
    Type: Grant
    Filed: October 31, 2003
    Date of Patent: March 29, 2011
    Assignee: Polymer Group, Inc.
    Inventors: Dianne Ellis, Jimmy D. West, Jennifer Mayhorn, Nick Carter
  • Patent number: 7906064
    Abstract: The present invention relates to methods for making oxidation resistant medical devices that comprise polymeric materials, for example, ultra-high molecular weight polyethylene (UHMWPE). The invention also provides methods of making antioxidant-doped medical implants, for example, doping of medical devices containing cross-linked UHMWPE with vitamin E by diffusion and materials used therein.
    Type: Grant
    Filed: November 29, 2006
    Date of Patent: March 15, 2011
    Assignees: The General Hospital Corporation, Cambridge Polymer Group, Inc.
    Inventors: Orhun K. Muratoglu, Stephen H. Spiegelberg
  • Publication number: 20110039969
    Abstract: The present invention relates to methods for making oxidation resistant medical devices that comprise polymeric materials, for example, ultra-high molecular weight polyethylene (UHMWPE). The invention also provides methods of making antioxidant-doped medical implants, for example, doping of medical devices containing cross-linked UHMWPE with vitamin E by diffusion, post-doping annealing, and materials used therein.
    Type: Application
    Filed: October 14, 2010
    Publication date: February 17, 2011
    Applicants: The General Hospital Corporation, Cambridge Polymer Group, Inc.
    Inventors: Orhun K. Muratoglu, Stephen H. Spiegelberg
  • Publication number: 20110004315
    Abstract: The present invention relates to methods for making oxidation resistant medical devices that comprise polymeric materials, for example, ultra-high molecular weight polyethylene (UHMWPE). The invention also provides methods of making antioxidant-doped medical implants, for example, doping of medical devices containing cross-linked UHMWPE with vitamin E by diffusion and materials used therein.
    Type: Application
    Filed: September 15, 2010
    Publication date: January 6, 2011
    Applicants: The General Hospital Corporation, Cambridge Polymer Group, Inc.
    Inventors: Orhun K. MURATOGLU, Stephen H. Spiegelberg
  • Patent number: 7833452
    Abstract: The present invention relates to methods for making oxidation resistant medical devices that comprise polymeric materials, for example, ultra-high molecular weight polyethylene (UHMWPE). The invention also provides methods of making antioxidant-doped medical implants, for example, doping of medical devices containing cross-linked UHMWPE with vitamin E by diffusion, post-doping annealing, and materials used therein.
    Type: Grant
    Filed: May 10, 2005
    Date of Patent: November 16, 2010
    Assignees: The General Hospital Corporation, Cambridge Polymer Group, Inc.
    Inventors: Orhun K. Muratoglu, Stephen H. Spiegelberg
  • Patent number: 7816287
    Abstract: A flame retardant cellulosic-based nonwoven fabric is provided having a synergistic blend of cellulosic and acrylic fiber that imparts unexpectedly enhanced flame retardant performance. The flame retardant finished nonwoven fabric can have at least about 15 wt % and no greater than about 35 wt % acrylic fiber and at least about 65 wt % and no greater than about 85% cellulosic fiber, where the nonwoven fabric has a char strength of at least 0.9 Newtons and exhibits a basis weight loss of no more than 7 wt % when exposed to a gas flame for 240 seconds. Bedding articles including the flame retardant finished nonwoven fabric are also provided.
    Type: Grant
    Filed: July 10, 2009
    Date of Patent: October 19, 2010
    Assignee: Polymer Group, Inc.
    Inventor: Herbert P. Hartgrove
  • Publication number: 20100262251
    Abstract: The present invention provides an irradiated crosslinked polyethylene containing reduced free radicals, preferably containing substantially no residual free radical. Disclosed is a process of making irradiated crosslinked polyethylene by irradiating the polyethylene in contact with a sensitizing environment at an elevated temperature that is below the melting point, in order to reduce the concentration of residual free radicals to an undetectable level. A process of making irradiated crosslinked polyethylene composition having reduced free radical content, preferably containing substantially no residual free radicals, by mechanically deforming the polyethylene at a temperature that is below the melting point of the polyethylene, optionally in a sensitizing environment, is also disclosed herein.
    Type: Application
    Filed: June 25, 2010
    Publication date: October 14, 2010
    Applicants: The General Hospital Corporation, Cambridge Polymer Group, Inc.
    Inventors: Orhun K. Muratoglu, Stephen H. Spiegelberg, Gareth H. McKinley
  • Patent number: 7790095
    Abstract: The present invention relates to methods for making oxidation resistant medical devices that comprise polymeric materials, for example, ultra-high molecular weight polyethylene (UHMWPE). The invention also provides methods of making antioxidant-doped medical implants, for example, doping of medical devices containing cross-linked UHMWPE with vitamin E by diffusion and materials used therein.
    Type: Grant
    Filed: November 30, 2007
    Date of Patent: September 7, 2010
    Assignees: The General Hospital Corporation, Cambridge Polymer Group, Inc.
    Inventors: Orhun K. Muratoglu, Stephen H. Spiegelberg
  • Patent number: 7776352
    Abstract: In preferred embodiments, the present invention provides methods of controllably making a vinyl polymer hydrogel having desired physical properties without chemical cross links or radiation. The gelation process is modulated by controlling, for example, the temperature of a resultant vinyl polymer mixture having a gellant or using active ingredients provided in an inactive gellant complex.
    Type: Grant
    Filed: August 7, 2006
    Date of Patent: August 17, 2010
    Assignee: Cambridge Polymer Group, Inc.
    Inventors: Jeffrey W. Ruberti, Gavin J. C. Braithwaite
  • Publication number: 20100190882
    Abstract: The present invention relates to methods for making cross-linked oxidation-resistant polymeric materials and preventing or minimizing in vivo elution of antioxidant from the antioxidant-containing polymeric materials. The invention also provides methods of doping polymeric materials with a spatial control of cross-linking and antioxidant distribution, for example, vitamin E (?-Tocopherol), and methods for extraction/elution of antioxidants, for example, vitamin E (?-tocopherol), from surface regions of antioxidant-containing polymeric materials, and materials used therewith also are provided.
    Type: Application
    Filed: January 25, 2008
    Publication date: July 29, 2010
    Applicants: The General Hosital Corporation, Cambridge Polymer Group, Inc.
    Inventors: Orhun K. Muratoglu, Edward T. Kopesky, Ebru Oral
  • Patent number: 7745532
    Abstract: The preferred embodiments of the present invention provide polymer compositions and methods for controlling a property of a resultant gel. A preferred method includes dissolving a vinyl polymer in a first solvent to form a solution; and contacting the vinyl polymer solution in a suitable volume of at least one immersion solvent comprising a second solvent to cause gelation. In preferred embodiments, the invention provides poly(vinyl alcohol) compositions and methods that produce physically crosslinked hydrogels that have tunable physical properties. Also provided are articles of manufacture such as prosthetic intervertebral disks and contact lenses.
    Type: Grant
    Filed: July 31, 2003
    Date of Patent: June 29, 2010
    Assignee: Cambridge Polymer Group, Inc.
    Inventors: Jeffrey W. Ruberti, Gavin J. C. Braithwaite
  • Patent number: 7722347
    Abstract: Apparatus (100, 101, 102) and die cartridge assembly (18, 44, 45, 47) adapted for use with same for producing fibrous material (212). The apparatus (100) comprises a removably attachable die cartridge assembly (18) that adapts to conventional spunmelt equipment. The die cartridge assembly (18) is removably positionable beneath an extrusion body (10) for effecting formation of fibrous material by fibrillation of polymer films. The cartridge assembly (18) includes at least one polymer passage (19) communicating with a molten polymer source (10) for directing molten polymer onto at least one film forming surface (20, 28) defined by the cartridge assembly (18), and also defines at least one gas passage (222, 22, 30) communicating with a gas source (16) for directing pressurized gas (220) against the molten polymer (210) in the form of a film for effecting formation of the fibrous material (212).
    Type: Grant
    Filed: June 20, 2006
    Date of Patent: May 25, 2010
    Assignee: Polymer Group, Inc.
    Inventors: Timothy Krause, Michael H. Johnson, Richard Ferencz
  • Publication number: 20100120314
    Abstract: An apparatus for producing sub-micron fibers, and more specifically an apparatus for effecting formation of sub-micron fibers by fibrillation of polymer films, and nonwoven materials and articles incorporating them.
    Type: Application
    Filed: November 23, 2009
    Publication date: May 13, 2010
    Applicant: POLYMER GROUP, INC.
    Inventors: Michael H. Johnson, Timothy Krause, Michael W. Hayes, Rajeev Chhabra, Savas Aydore, Olaf Erik Alexander Isele, Han Xu
  • Publication number: 20100098919
    Abstract: The present invention is directed to a hydroentangled flame retardant nonwoven fabric, and more specifically, to a cellulosic flame retardant fabric comprising a self extinguishing fiber so as to minimize the total percentage of fabric weight lost upon burning in accordance with technical bulletin 604. Use of natural fiber fabrics in bedding components is desirable due to the softness and durability associated with the fabrics; however, natural fiber, such as cellulose, is highly flammable and therefore lacks the ability to provide the proper flammability protection often sought out in bedding components. In accordance with the present invention, a small amount of self-extinguishing fiber, such as a modacrylic fiber, was blended with the natural fiber and hydroentangled to form a nonwoven composite fabric that is soft, flame retardant, and suitable for bedding articles.
    Type: Application
    Filed: November 11, 2009
    Publication date: April 22, 2010
    Applicant: POLYMER GROUP, INC.
    Inventors: Herbert Hartgrove, Gregory Rabon, Russell Tindall
  • Publication number: 20100081354
    Abstract: Thermal compression moldable nonwoven multilayered fibrous batts having substantially uniform density are provided, which are useful, for example, for fabrication of multi-density molded parts, such as multi-density molded vehicle liners. The nonwoven multilayered fibrous batts of uniform density comprising needle-punched first and second (and optionally third and/or fourth) fibrous batt layers formed with different fiber blends, wherein the multilayered batt can be molded into acoustical parts having multi-densities.
    Type: Application
    Filed: October 1, 2008
    Publication date: April 1, 2010
    Applicant: POLYMER GROUP, INC.
    Inventors: Gale Shipley, Anna Jean Sill, Stephen Foss
  • Patent number: 7666343
    Abstract: A process and apparatus for producing sub-micron fibers, and more specifically a process and apparatus for effecting formation of sub-micron fibers by fibrillation of polymer films, and nonwoven materials and articles incorporating them.
    Type: Grant
    Filed: October 18, 2006
    Date of Patent: February 23, 2010
    Assignee: Polymer Group, Inc.
    Inventors: Michael H. Johnson, Timothy Krause, Michael W. Hayes, Rajeev Chhabra, Savas Aydore, Olaf Erik Alexander Isele, Han Xu
  • Patent number: D622965
    Type: Grant
    Filed: December 4, 2009
    Date of Patent: September 7, 2010
    Assignee: Polymer Group, Inc.
    Inventors: Clifford D. Bridges, Thomas J. Seamon
  • Patent number: D622966
    Type: Grant
    Filed: December 4, 2009
    Date of Patent: September 7, 2010
    Assignee: Polymer Group, Inc.
    Inventors: Clifford D. Bridges, Thomas J. Seamon