Patents by Inventor Andreas Kerkmann

Andreas Kerkmann 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).

  • Absorbent polymer structure with improved retention capacity and permeability
    Patent number: 7833624
    Abstract: A process for producing an absorbent polymer structure (Pa) by treating the outer portion of an untreated absorbent polymer structure (Pu1). The process includes the step of bringing the outer portion of the untreated absorbent polymer structure (Pu1) into contact with an aqueous solution including at least one chemical cross-linker and at least one inorganic compound in dispersed colloidal form. The process also includes the step of heating the absorbent polymer structure, of which the outer portion has been brought into contact with the aqueous solution, at a temperature within a range from about 40 to about 300° C., so that the outer portion of the absorbent polymer structure is more strongly cross-linked in comparison to the inner portion and the inorganic compound is at least partly immobilized in the outer portion of the absorbent polymer structure.
    Type: Grant
    Filed: October 24, 2003
    Date of Patent: November 16, 2010
    Assignee: Evonik Stockhuasen GmbH
    Inventors: Jörg Harren, Helmut Brehm, Andreas Kerkmann, Stephan Ramlow
  • Absorbent polymer structure with improved retention capacity and permeability
    Publication number: 20060029782
    Abstract: A process for producing an absorbent polymer structure (Pa) by treating the outer portion of an untreated absorbent polymer structure (Pu1). The process includes the step of bringing the outer portion of the untreated absorbent polymer structure (Pu1) into contact with an aqueous solution including at least one chemical cross-linker and at least one inorganic compound in dispersed colloidal form. The process also includes the step of heating the absorbent polymer structure, of which the outer portion has been brought into contact with the aqueous solution, at a temperature within a range from about 40 to about 300° C., so that the outer portion of the absorbent polymer structure is more strongly cross-linked in comparison to the inner portion and the inorganic compound is at least partly immobilized in the outer portion of the absorbent polymer structure.
    Type: Application
    Filed: October 24, 2003
    Publication date: February 9, 2006
    Inventors: Jorg Harren, Helmut Brehm, Andreas Kerkmann, Stephan Ramlow