Patents by Inventor Robert Warth

Robert Warth 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).

  • Swellable phyllosilicates
    Patent number: 7419540
    Abstract: A swellable layer silicate is described based on smectite or sepiolite/palygorskite for use in media containing di- or polyvalent cations that reduce swellability, characterized by a swelling volume of about 5 to 50 mL, measured by addition of 2 g layer silicate (air-dried) to 100 mL water, and by a fineness of maximum 5 wt. % >40 ?m and maximum 20% >20 ?m, as dry sieve residue.
    Type: Grant
    Filed: August 29, 2001
    Date of Patent: September 2, 2008
    Assignee: Sud-Chemie AG
    Inventors: Markus Möller, Helmut Coutelle, Robert Warth, Wolfgang Heininger
  • Swellable phyllosilicates
    Publication number: 20040037894
    Abstract: A swellable layer silicate is described based on smectite or sepiolite/palygorskite for use in media containing di- or polyvalent cations that reduce swellability, characterized by a swelling volume of about 5 to 50 mL, measured by addition of 2 g layer silicate (air-dried) to 100 mL water, and by a fineness of maximum 5 wt. % >40 &mgr;m and maximum 20% >20 &mgr;m, as dry sieve residue.
    Type: Application
    Filed: May 21, 2003
    Publication date: February 26, 2004
    Inventors: Markus Mller, Helmut Coutelle, Robert Warth, Wolfgang Heininger