Patents by Inventor Harmut Ruf

Harmut Ruf 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).

  • Cellulosic molded body, method for manufacturing it and use thereof
    Patent number: 8367203
    Abstract: The present invention relates to a cellulosic molded body containing a cellulose/clay nanocomposite, wherein the clay component of said nanocomposite comprises a material selected from the group consisting of unmodified hectorite clays and hydrophilically modified hectorite clays.
    Type: Grant
    Filed: August 17, 2006
    Date of Patent: February 5, 2013
    Assignee: Lenzing Aktiengesellschaft
    Inventors: Harmut Rüf, Heinrich Firgo, Gert Kroner
  • Cellulosic Molded Body, Method For Manufacturing It and Use Thereof
    Publication number: 20080233821
    Abstract: The present invention relates to a cellulosic molded body containing a cellulose/clay nanocomposite, wherein the clay component of said nanocomposite comprises a material selected from the group consisting of unmodified hectorite clays and hydrophilically modified hectorite clays.
    Type: Application
    Filed: August 17, 2006
    Publication date: September 25, 2008
    Applicant: Lenzing Aktiengesellschaft
    Inventors: Harmut Ruf, Heinrich Firgo, Gert Kroner
  • Process and device for the production of cellulosic moulded bodies
    Patent number: 6706224
    Abstract: The invention relates to a process for the production of a spunlaid fabric containing solvent-spun cellulosic fibers.
    Type: Grant
    Filed: January 24, 2001
    Date of Patent: March 16, 2004
    Assignee: Lenzing Aktiengesellschaft
    Inventors: Heinrich Firgo, Rudolf Kraft, Harmut Rüf, Christian Schlossnikl
  • Composition containing fine solid particles
    Patent number: 6488876
    Abstract: The invention relates to a composition intended to be admixed to a moldable solution of cellulose in an aqueous tertiary amine oxide, which composition consists of solid particles, a mixture of a tertiary amine oxide and water, in which the solid particles are dispersed, and at least a further substance, with the proviso that the solid particles and said at least further substance are different from cellulose and that the content of water is such that no cellulose will precipitate when admixing the composition to the moldable cellulose solution. The composition according to the invention is storage stable to a high degree and suitable for introducing additives into the moldable cellulose solution.
    Type: Grant
    Filed: February 3, 1999
    Date of Patent: December 3, 2002
    Assignee: Lenzing Aktiengesellschaft
    Inventor: Harmut Rüf
  • Process and device for the production of cellulosic moulded bodies
    Publication number: 20020046799
    Abstract: The invention relates to a process for the production of a spunlaid fabric containing solvent-spun cellulosic fibres.
    Type: Application
    Filed: January 24, 2001
    Publication date: April 25, 2002
    Applicant: LENZING AKTIENGESELLSCHAFT
    Inventors: Heinrich Firgo, Rudolf Kraft, Harmut Ruf, Christian Schlossnikl
  • Process for producing a strengthened fiber assembly
    Patent number: 6042890
    Abstract: The invention relates to a process for producing a strengthened fiber assembly containing cellulosic fibers with the cellulose being present in the crystalline structure of cellulose II, by contacting the fiber assembly with an aqueous solution of N-methylmorpholine-N-oxide (NMMO) at elevated temperature and subsequently washing the fiber assembly, characterized in that contacting is effected in a manner that from the relation-947+0.30.times.log.sub.(10) t+0.046.times.T-3.53.times.C +645.times.log.sub.(10) Cwherein t indicates the time in minutes during which the fiber assembly is contacted with the aqueous NMMO solution, T indicates the temperature of the aqueous NMMO solution in .degree.C. and C is the concentration of NMMO in % by mass, based on the aqueous NMMO solution, a number in the range of 0.30 to 1.70 results with the proviso that the temperature T is smaller than 130.degree. C. and the concentration C ranges between 70 and 84 % by mass.
    Type: Grant
    Filed: October 16, 1998
    Date of Patent: March 28, 2000
    Assignee: Lenzing Aktiengesellschaft
    Inventors: Harmut Ruf, Heinrich Firgo, Siegfried Ambrosch, Christian Schlossnikl, Raimund Jurkovic