Patents by Inventor Sune Wännström

Sune Wännström 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).

  • FILLER FOR PAPERMAKING PROCESS
    Publication number: 20160010280
    Abstract: The present invention relates to a filler comprising calcium salt and cellulose derivative having a degree of substitution of net ionic groups up to about 0.65, wherein the filler is substantially free from fibres or fibrils of cellulose or lignocellulose. The invention also relates to a filler comprising calcium salt and a cellulose derivative having a degree of substitution of net ionic groups up to about 0.65, wherein the cellulose derivative contains cationic groups.
    Type: Application
    Filed: September 17, 2015
    Publication date: January 14, 2016
    Inventors: Peter Marten van der Horst, Erik Sanne, Kjell Rune Andersson, Cherryleen Garcia-Lindgren, Marie-Louise Wallberg, Sune Wännström
  • Filler for papermaking process
    Patent number: 9156990
    Abstract: The present invention relates to a filler comprising calcium salt and cellulose derivative having a degree of substitution of net ionic groups up to about 0.65, wherein the filler is substantially free from fibers or fibrils of cellulose or lignocellulose. The invention also relates to a filler comprising calcium salt and a cellulose derivative having a degree of substitution of net ionic groups up to about 0.65, wherein the cellulose derivative contains cationic groups.
    Type: Grant
    Filed: December 21, 2004
    Date of Patent: October 13, 2015
    Assignee: EKA CHEMICALS AB
    Inventors: Peter Marten Van Der Horst, Erik Sanne, Kjell Rune Andersson, Cherryleen Garcia-Lindgren, Marie-Louise Wallberg, Sune Wännström
  • In situ detoxification of fermentation inhibitors with reducing agents
    Patent number: 8815499
    Abstract: The present invention provides a method for decreasing the fermentation inhibition in a fermentation of cellulose-derived material in a fermentor, wherein fermentation inhibitory properties of the material subjected to fermentation is decreased by an addition of at least one reducing agent to the fermentor. Further, there is provided a method of increasing the fermentability of a fermentation process comprising the steps of measuring the fermentability of the fermentation process and if the fermentability is below a reference value, then adding at least one reducing agent to the fermentation process.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: August 26, 2014
    Assignee: Sekab E-Technology AB
    Inventors: Björn Alriksson, Leif Jönsson, Sune Wännström
  • In Situ Detoxification of Fermentation Inhibitors with Reducing Agents
    Publication number: 20130022958
    Abstract: The present invention provides a method for decreasing the fermentation inhibition in a fermentation of cellulose-derived material in a fermentor, wherein fermentation inhibitory properties of the material subjected to fermentation is decreased by an addition of at least one reducing agent to the fermentor. Further, there is provided a method of increasing the fermentability of a fermentation process comprising the steps of measuring the fermentability of the fermentation process and if the fermentability is below a reference value, then adding at least one reducing agent to the fermentation process.
    Type: Application
    Filed: December 17, 2010
    Publication date: January 24, 2013
    Inventors: Björn Alriksson, Leif Jönsson, Sune Wännström
  • Filler for papermaking process
    Publication number: 20050155520
    Abstract: The present invention relates to a filler comprising calcium salt and cellulose derivative having a degree of substitution of net ionic groups up to about 0.65, wherein the filler is substantially free from fibres or fibrils of cellulose or lignocellulose. The invention also relates to a filler comprising calcium salt and a cellulose derivative having a degree of substitution of net ionic groups up to about 0.65, wherein the cellulose derivative contains cationic groups.
    Type: Application
    Filed: December 21, 2004
    Publication date: July 21, 2005
    Inventors: Peter Van Der Horst, Erik Sanne, Kjell Andersson, Cherryleen Garcia-Lindgren, Marie-Louise Wallberg, Sune Wannstrom