Patents by Inventor Jean Francois Woll

Jean Francois Woll 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).

  • Arrangement for sealing a closed production system
    Patent number: 6364317
    Abstract: This invention relates to an arrangement for sealing a closed chamber in which equipment is to be replaced and especially to a chamber in which equipment is to be replaced while the chamber is to be maintained closed. The arrangement includes a channel filled with a fluid, such as water, and a skirt arranged to extend into the fluid to form the seal. As the skirt extends down into the liquid, a portal space is formed at the opening in the chamber and the opening preferably includes a gate for closing the chamber from the portal space and the outside.
    Type: Grant
    Filed: June 8, 2000
    Date of Patent: April 2, 2002
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Tom Edward Estep, Ronald P. Hoffman, James R. Hunter, Jean Joseph Muller, Germain Schilz, Carl E. Vorhees, James M. Wiggins, Jean Francois Woll
  • Arrangement for sealing a closed production system
    Patent number: 6101698
    Abstract: This invention relates to an arrangement for sealing a closed chamber in which equipment is to be replaced and especially to a chamber in which equipment is to be replaced while the chamber is to be maintained closed. The arrangement includes a channel filled with a fluid, such as water, and a skirt arranged to extend into the fluid to form the seal. As the skirt extends down into the liquid, a portal space is formed at the opening in the chamber and the opening preferably includes a gate for closing the chamber from the portal space and the outside.
    Type: Grant
    Filed: April 21, 1997
    Date of Patent: August 15, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Tom Edward Estep, Ronald P. Hoffman, James R. Hunter, Jean Joseph Muller, Germain Schilz, Carl E. Vorhees, James M. Wiggins, Jean Francois Woll
  • Lateral entry remotely operated coupling system
    Patent number: 6059318
    Abstract: This invention relates to a coupling system for connecting one or more fluid conduits wherein the system is adapted for lateral entry of one pipe or conduit to the other. The coupling system is also suited for making a connection in an environment which is relatively inaccessible to personnel and may be remotely operated.
    Type: Grant
    Filed: April 21, 1997
    Date of Patent: May 9, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Tom Edward Estep, Ronald P. Hoffman, James R. Hunter, Jean Joseph Muller, Germain Schilz, Carl E. Vorhees, James M. Wiggins, Jean Francois Woll
  • Apparatus for forming a fibrous sheet
    Patent number: 5731011
    Abstract: An apparatus for adjusting the path that a web formed by striking a contoured surface baffle will take as it descends to a collection surface, in which the baffle is mounted on a pivot plate which will pivot and cause the web to leave the contoured surface baffle at the desired angle.
    Type: Grant
    Filed: January 31, 1997
    Date of Patent: March 24, 1998
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Robert Carl Agreen, Wayne Edward Billings, Robert Anthony Marin, Jean Francois Woll, Ottmar Niederpruem, Michael Allen Bryner
  • Corona charging of flash spun plexifilamentary film-fibril webs in poor charging environments
    Patent number: 5643524
    Abstract: This invention relates to flash spinning a plexifilamentary film-fibril strand and laying it down into sheet material including the step of subjecting the strand to an electrostatic charge. The invention is particularly focused on cleaning, and maintaining clean, the target plate of the electrostatic charging system by scrubbing or scouring the surface of the target plate with a highly abrasive brush moving at a relatively high speed. The target plate is selected to be abrasion resistant.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: July 1, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Jacques Gilbert De Cauwer, Ottmar Niederpruem, Michel Stachnik, Jean Francois Woll, Thomas Bednarz