Patents by Inventor Nils Berggren

Nils Berggren 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).

  • Polymeric compositions for dewatering sewage sludges
    Patent number: 7084205
    Abstract: Compositions comprising of blends of polymeric materials, including a cationic polymer having an intrinsic viscosity of from 8 to 17 dl/g and a cationic content of from 20 to 100% which may be used in the dewatering of thermophilic sludges.
    Type: Grant
    Filed: August 14, 2001
    Date of Patent: August 1, 2006
    Assignee: Ciba Specialty Chemicals Water Treatments Ltd.
    Inventors: Peter Ian Norman, Helen Elizabeth Read, Nils Berggren
  • Polymeric compositions for dewatering sewage sludges
    Publication number: 20030178371
    Abstract: Compositions comprising of blends of polymeric materials, including a cationic polymer having an intrinsic viscosity of from 8 to 17 dl/g and a cationic content of from 20 to 100% which may be used in the dewatering of thermophilic sludges.
    Type: Application
    Filed: February 14, 2003
    Publication date: September 25, 2003
    Inventors: Peter Ian Norman, Helen Elizabeth Read, Nils Berggren