Patents by Inventor Veikko Niinivaara

Veikko Niinivaara 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).

  • Additive for paper making
    Patent number: 7094319
    Abstract: The object of the invention is an additive for paper making by means of which the dusting tendency of paper can be reduced. The agent is based on starch, the molecular size of which has been reduced, and which has been cationized to a charge of less than 1.5 meq/g with a quaternary nitrogen compound. The agent is added to the fiber pulp for paper making prior to web formation.
    Type: Grant
    Filed: January 30, 2004
    Date of Patent: August 22, 2006
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Tapio Vihervaara, Kari Luukkonen, Veikko Niinivaara
  • Additive for paper making
    Publication number: 20040188048
    Abstract: The object of the invention is an additive for paper making by means of which the dusting tendency of paper can be reduced. The agent is based on starch, the molecular size of which has been reduced, and which has been cationized to a charge of less than 1.5 meq/g with a quaternary nitrogen compound. The agent is added to the fiber pulp for paper making prior to web formation.
    Type: Application
    Filed: January 30, 2004
    Publication date: September 30, 2004
    Inventors: Tapio Vihervaara, Kari Luukkonen, Veikko Niinivaara
  • Additive for paper making
    Patent number: 6716313
    Abstract: The object of the invention is an additive for paper making by means of which the dusting tendency of paper can be reduced. The agent is based on starch, the molecular size of which has been reduced, and which has been cationized to a charge of less than 1.5 meq/g with a quaternary nitrogen compound. The agent is added to the fiber pulp for paper making prior to web formation.
    Type: Grant
    Filed: April 30, 2002
    Date of Patent: April 6, 2004
    Assignee: Raisio Chemicals, Ltd.
    Inventors: Tapio Vihervaara, Kari Luukkonen, Veikko Niinivaara
  • Additive for paper making
    Publication number: 20030041988
    Abstract: The object of the invention is an additive for paper making by means of which the dusting tendency of paper can be reduced. The agent is based on starch, the molecular size of which has been reduced, and which has been cationized to a charge of less than 1.5 meq/g with a quaternary nitrogen compound. The agent is added to the fiber pulp for paper making prior to web formation.
    Type: Application
    Filed: April 30, 2002
    Publication date: March 6, 2003
    Inventors: Tapio Vihervaara, Kari Luukkonen, Veikko Niinivaara
  • Additive for paper making
    Patent number: 6398912
    Abstract: The object of the invention is an additive for paper making by means of which the dusting tendency of paper can be reduced. The agent is based on starch, the molecular size of which has been reduced, and which has been cationized to a charge of less than 1.5 mEkv/g with a quaternary nitrogen compound. The agent is added to the fiber pulp for paper making prior to web formation.
    Type: Grant
    Filed: January 9, 2001
    Date of Patent: June 4, 2002
    Assignee: Raisio Chemicals Ltd.
    Inventors: Tapio Vihervaara, Kari Luukkonen, Veikko Niinivaara