Patents by Inventor Ubbo von Oehsen

Ubbo von Oehsen 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).

  • Method for the secondary crosslinking of hydrogels with bicyclic amide acetals
    Patent number: 7754822
    Abstract: A process for postcrosslinking a water-absorbing polymer comprises said polymer being treated with a postcrosslinker and, during or after said treating, being postcrosslinked and dried by temperature elevation, said postcrosslinker being a compound of the formula I where R1, R2, R3, R4, R5, R6, R7, R8 and R9 are each independently hydrogen, C1-C12-alkyl, C2-C12-alkenyl or C6-C12-aryl, wherein C1-C12-alkyl, C2-C12-alkenyl or C6-C12-aryl may be halogen substituted. The liquid-absorbing polymers are useful in hygiene articles and packaging materials.
    Type: Grant
    Filed: July 7, 2004
    Date of Patent: July 13, 2010
    Assignee: BASF Aktiengesellschaft
    Inventors: Thomas Daniel, Ulrich Riegel, Mark Elliott, Ubbo von Oehsen, Kai Michael Exner, Klemens Massonne