Patents Assigned to Polymer Group, Inc.
  • Patent number: 8968628
    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: January 10, 2011
    Date of Patent: March 3, 2015
    Assignees: The General Hospital Corp., Cambridge Polymer Group, Inc.
    Inventors: Orhun K. Muratoglu, Stephen H. Spiegelberg
  • Patent number: 8962501
    Abstract: Nonwoven web products containing sub-micron fibers, and more specifically nonwoven web products having sub-micron fibers formed by fibrillation of polymer films, and nonwoven materials and articles incorporating them, and methods of producing these products.
    Type: Grant
    Filed: March 7, 2011
    Date of Patent: February 24, 2015
    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: 8888859
    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: April 23, 2012
    Date of Patent: November 18, 2014
    Assignees: The General Hospital Corporation, Cambridge Polymer Group, Inc.
    Inventors: Orhun K. Muratoglu, Stephen H. Spiegelberg
  • Patent number: 8865043
    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: September 7, 2012
    Date of Patent: October 21, 2014
    Assignees: The General Hospital Corporation, Cambridge Polymer Group, Inc.
    Inventors: Orhun K. Muratoglu, Stephen H. Spiegelberg
  • Publication number: 20140275318
    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: May 27, 2014
    Publication date: September 18, 2014
    Applicants: The General Hospital Corporation, Cambridge Polymer Group, Inc.
    Inventors: Orhun K. MURATOGLU, Stephen H. Spiegelberg
  • Publication number: 20140183794
    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: March 10, 2014
    Publication date: July 3, 2014
    Applicants: Cambridge Polymer Group, Inc., The General Hospital Corporation
    Inventors: Orhun K. MURATOGLU, Stephen H. Spiegelberg
  • Patent number: 8728379
    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: September 15, 2010
    Date of Patent: May 20, 2014
    Assignees: The General Hospital Corporation, Cambridge Polymer Group, Inc.
    Inventors: Orhun K. Muratoglu, Stephen H. Spiegelberg
  • Publication number: 20140103556
    Abstract: A spinneret, apparatus, and method are provided for making filaments for fibrous nonwoven fabrics with more uniform filament and fabric formation while minimizing filament breaks and hard spot defects in webs and fabrics made therefrom. The spinneret has a spinneret body that has an overall length to hydraulic diameter ratio and defines orifices that extend through the spinneret body, wherein the orifices comprise capillaries that open at a face of the spinneret body for polymer filament extrusion therefrom, wherein the capillaries are arranged in a plurality of different rows at the face of the spinneret body, and wherein the plurality of different rows are arranged into a plurality of different zones at the face of the spinneret body.
    Type: Application
    Filed: October 16, 2012
    Publication date: April 17, 2014
    Applicant: POLYMER GROUP, INC.
    Inventors: Sergio Rafael Diaz de Leon Izquierdo, Marcal Bargallo Alabart, John Arthur Street, John F. Steffen, Ralph A. Moody, III
  • Publication number: 20140097559
    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: September 25, 2013
    Publication date: April 10, 2014
    Applicants: Cambridge Polymer Group, Inc., The General Hospital Corporation
    Inventors: Orhun K. MURATOGLU, Edward T. Kopesky, Ebru Oral
  • Patent number: 8637063
    Abstract: The invention provides methods of making hydrolyzed cross-linked polyvinyl alcohol (PVA) hydrogels by polymerizing vinyl acetate (VAc) monomers to polyvinyl acetate (PVAc) polymer network by chemical-crosslinking and hydrolysis. The invention also provides methods for including pendant chains in the hydrogel during the polymerization process. Materials produced and use of the cross-linked hydrolyzed PVA hydrogels also are disclosed herein.
    Type: Grant
    Filed: December 7, 2009
    Date of Patent: January 28, 2014
    Assignee: Cambridge Polymer Group, Inc.
    Inventors: Edward T. Kopesky, Jason Berlin, Martin F. Van Buren, Gavin J. C. Braithwaite
  • Patent number: 8569395
    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: Grant
    Filed: July 31, 2012
    Date of Patent: October 29, 2013
    Assignees: The General Hospital Corporation, Cambridge Polymer Group, Inc.
    Inventors: Orhun K. Muratoglu, Edward T. Kopesky, Ebru Oral
  • Patent number: 8530057
    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: May 12, 2009
    Date of Patent: September 10, 2013
    Assignees: The General Hospital Corporation, Cambridge Polymer Group, Inc.
    Inventors: Orhun K. Muratoglu, Stephen H. Spiegelberg
  • Patent number: 8512626
    Abstract: Processes for producing nonwoven web products containing sub-micron fibers are provided, and more specifically processes for producing nonwoven web products having sub-micron fibers formed by fibrillation of polymer films are provided.
    Type: Grant
    Filed: July 2, 2012
    Date of Patent: August 20, 2013
    Assignee: Polymer Group, Inc.
    Inventors: Michael H. Johnson, Timothy Krause, Michael W. Hayes, Rajeev Chhabra, Savas Aydore, Olaf Erik Alexander Isele, Han Xu
  • Publication number: 20130200555
    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: March 14, 2013
    Publication date: August 8, 2013
    Applicants: Cambridge Polymer Group, Inc., The General Hospital Corporation
    Inventors: The General Hospital Corporation, Cambridge Polymer Group, Inc.
  • Patent number: D688882
    Type: Grant
    Filed: October 15, 2012
    Date of Patent: September 3, 2013
    Assignee: Polymer Group, Inc.
    Inventors: Wayne Thomas Rhodes, Russell Glenn Tindall, Mark Lee Landreth, Paul Michael Harmon, Jerome Kenneth Reeves
  • Patent number: D692673
    Type: Grant
    Filed: July 19, 2013
    Date of Patent: November 5, 2013
    Assignee: Polymer Group, Inc.
    Inventors: Wayne Thomas Rhodes, III, Russell Glenn Tindall, Mark Lee Landreth, Paul Michael Harmon, Jerome Kenneth Reeves
  • Patent number: D693130
    Type: Grant
    Filed: July 19, 2013
    Date of Patent: November 12, 2013
    Assignee: Polymer Group, Inc.
    Inventors: Wayne Thomas Rhodes, III, Russell Glenn Tindall, Mark Lee Landreth, Paul Michael Harmon, Jerome Kenneth Reeves
  • Patent number: D696869
    Type: Grant
    Filed: October 15, 2012
    Date of Patent: January 7, 2014
    Assignee: Polymer Group, Inc.
    Inventors: Wayne Thomas Rhodes, III, Russell Glenn Tindall, Mark Lee Landreth, Paul Michael Harmon, Jerome Kenneth Reeves
  • Patent number: D702047
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: April 8, 2014
    Assignee: Polymer Group, Inc.
    Inventors: Wayne Thomas Rhodes, III, Russell Glenn Tindall, Mark Lee Landreth, Paul Michael Harmon, Jerome Kenneth Reeves
  • Patent number: D706042
    Type: Grant
    Filed: October 15, 2012
    Date of Patent: June 3, 2014
    Assignee: Polymer Group, Inc.
    Inventors: Wayne Thomas Rhodes, III, Russell Glenn Tindall, Mark Lee Landreth, Paul Michael Harmon, Jerome Kenneth Reeves