Patents by Inventor James H. Chastain

James H. Chastain 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).

  • Dental floss having low density and method of making same
    Patent number: 7060354
    Abstract: A dental floss comprising a porous PTFE fiber having a density of less than about 0.7 g/cc. The inventive floss is abrasion resistant, grippable and has a soft feel to the hands and a rough feel in the mouth. The floss is made by an extrusion process with non-contact heating during subsequent expansion with amorphous locking.
    Type: Grant
    Filed: January 9, 2003
    Date of Patent: June 13, 2006
    Assignee: Gore Enterprise Holdings, Inc.
    Inventors: Richard L. Baillie, James H. Chastain, John W. Dolan, William Hammond Wiley
  • Dental floss having low density and method of making same
    Publication number: 20030196676
    Abstract: A dental floss comprising a porous PTFE fiber having a density of less than about 0.7 g/cc. The inventive floss is abrasion resistant, grippable and has a soft feel to the hands and a rough feel in the mouth. The floss is made by an extrusion process with non-contact heating during subsequent expansion with amorphous locking.
    Type: Application
    Filed: May 19, 2003
    Publication date: October 23, 2003
    Inventors: Richard L. Baillie, James H. Chastain, John W. Dolan, William Hammond Wiley
  • Dental floss having low density and method of making same
    Publication number: 20030172951
    Abstract: A dental floss comprising a porous PTFE fiber having a density of less than about 0.7 g/cc. The inventive floss is abrasion resistant, grippable and has a soft feel to the hands and a rough feel in the mouth. The floss is made by an extrusion process with non-contact heating during subsequent expansion with amorphous locking.
    Type: Application
    Filed: January 9, 2003
    Publication date: September 18, 2003
    Inventors: Richard L. Baillie, James H. Chastain, John W. Dolan, William Hammond Wiley
  • Dental floss having low density and method of making same
    Patent number: 6539951
    Abstract: A dental floss comprising a porous PTFE fiber having a density of less than about 0.7 g/cc. The inventive floss is abrasion resistant, grippable and has a soft feel to the hands and a rough feel in the mouth. The floss is made by an extrusion process with non-contact heating during subsequent expansion with amorphous locking.
    Type: Grant
    Filed: November 24, 1999
    Date of Patent: April 1, 2003
    Assignee: Gore Enterprise Holdings, Inc.
    Inventors: Richard L. Baillie, James H. Chastain, John W. Dolan, William Hammond Wiley
  • IMPROVED DENTAL FLOSS HAVING LOW DENSITY AND METHOD OF MAKING SAME
    Publication number: 20030037798
    Abstract: A dental floss comprising a porous PTFE fiber having a density of less than about 0.7 g/cc. The inventive floss is abrasion resistant, grippable and has a soft feel to the hands and a rough feel in the mouth. The floss is made by an extrusion process with non-contact heating during subsequent expansion with amorphous locking.
    Type: Application
    Filed: November 24, 1999
    Publication date: February 27, 2003
    Inventors: Richard L. Baillie, James H. Chastain, John W. Dolan, William Hammond Wiley
  • Method of insitu bypass to hold open venous valves
    Patent number: 5843171
    Abstract: A tube of porous PTFE having at least two first and at least two second regions wherein the at least two first regions have a greater density than the at least two second regions. For tubes of porous expanded PTFE having a microstructure of nodes interconnected by fibrils, the at least two first regions have a mean fibril length that is less than that of the at least two second regions. Preferably the regions are arranged in the form of ring-shaped segments of the tube wherein denser segments alternate along the length of the tube with less dense segments. Other arrangements between the different regions are possible; for example, the regions may be oriented in a spiral relationship with each other along the length of the tube. The porous PTFE tubes of the present invention have excellent radial compression resistance without requiring additional exterior reinforcing members due to the presence of the denser regions that are provided with a circumferential orientation.
    Type: Grant
    Filed: January 24, 1997
    Date of Patent: December 1, 1998
    Assignee: W. L. Gore & Associates, Inc.
    Inventors: Carey V. Campbell, James H. Chastain, Larry J. Kovach, Alvaro J. Laguna, Daniel B. Pond
  • Radially supported polytetrafluoroethylene vascular graft
    Patent number: 5747128
    Abstract: A tube of porous PTFE having at least two first and at least two second regions wherein the at least two first regions have a greater density than the at least two second regions. For tubes of porous expanded PTFE having a microstructure of nodes interconnected by fibrils, the at least two first regions have a mean fibril length that is less than that of the at least two second regions. Preferably the regions are arranged in the form of ring-shaped segments of the tube wherein denser segments alternate along the length of the tube with less dense segments. Other arrangements between the different regions are possible; for example, the regions may be oriented in a spiral relationship with each other along the length of the tube. The porous PTFE tubes of the present invention have excellent radial compression resistance without requiring additional exterior reinforcing members due to the presence of the denser regions that are provided with a circumferential orientation.
    Type: Grant
    Filed: January 29, 1996
    Date of Patent: May 5, 1998
    Assignee: W. L. Gore & Associates, Inc.
    Inventors: Carey V. Campbell, James H. Chastain, Alvaro J. Laguna, Daniel B. Pond