Patents by Inventor Patrick Lauffenburger

Patrick Lauffenburger 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).

  • Nonwoven web and fibers with electret properties, manufacturing processes thereof and their use
    Patent number: 10036107
    Abstract: The invention provides a nonwoven electret web comprising fibers made from a thermoplastic polymer material which comprises a polymer, a first additive (a) and a second additive (b), wherein the first additive (a) comprises a hindered amine and the second additive (b) comprises a metal salt of a carboxylic acid and/or an organic amide derived from a carboxylic acid and an amine. The invention further provides a process for making the nonwoven electret web, a fiber, a process for making the fiber, a multi-layer sheet, and the use of the nonwoven electret web, the fiber or the multilayered sheet as a filter material or as a dust-removing fabric for cleaning purposes.
    Type: Grant
    Filed: August 18, 2011
    Date of Patent: July 31, 2018
    Assignee: Fiberweb Holdings Limited
    Inventors: Ralph Berkemann, Patrick Lauffenburger
  • Nonwoven Web and Fibers with Electret Properties, Manufacturing Processes Thereof and Their Use
    Publication number: 20130288555
    Abstract: The invention provides a nonwoven electret web comprising fibers made from a thermoplastic polymer material which comprises a polymer, a first additive (a) and a second additive (b), wherein the first additive (a) comprises a hindered amine and the second additive (b) comprises a metal salt of a carboxylic acid and/or an organic amide derived from a carboxylic acid and an amine. The invention further provides a process for making the nonwoven electret web, a fiber, a process for making the fiber, a mullti-layer sheet, and the use of the nonwoven electret web, the fiber or the multilayered sheet as a filter material or as a dust-removing fabric for cleaning purposes.
    Type: Application
    Filed: August 18, 2011
    Publication date: October 31, 2013
    Inventors: Ralph Berkemann, Patrick Lauffenburger
  • Nonwoven based on polymers derived from lactic acid, process for manufacture and use of such a nonwoven
    Patent number: 5985776
    Abstract: A nonwoven fabric formed from filaments made from a polymer derived from L- and D-lactic acid. The nonwoven fabric is biodegradable and especially suitable for use in disposable hygiene products.
    Type: Grant
    Filed: August 1, 1994
    Date of Patent: November 16, 1999
    Assignee: Fiberweb France
    Inventors: Eric Bertrand, Philippe Guipouy, Patrick Lauffenburger, Philippe Ehret