Patents by Inventor Susanna Gunnars

Susanna Gunnars 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).

  • Oxidized polymeric carbohydrates and products made thereof
    Patent number: 6987181
    Abstract: The present invention relates to a polysaccharide having functional groups, wherein said groups are aldehyde groups formed at positions C2 and/or C3 as well as at position C6 of the anhydroglucose units of the polysaccharide chain. Preferably the polysaccharide is a cellulosic fibrous material whose primary and secondary hydroxyl groups of the cellulose are oxidized into aldehyde groups at least in part by means of TEMPO oxidation and periodate oxidation. The invention also concerns a paper or nonwoven comprising the above polysacaride. According to the invention a relative wet strength of more than 10% can be achieved.
    Type: Grant
    Filed: May 14, 2003
    Date of Patent: January 17, 2006
    Assignee: SCA Hygiene Products GmbH
    Inventors: Thomas Jaschinski, Susanna Gunnars, Arie Cornelis Besemer, Petter Bragd
  • Oxidized cellulose-containing fibrous materials and products made therefrom
    Patent number: 6824645
    Abstract: The present invention relates to a cellulose-containing fibrous material, wherein hydroxy groups were oxidized at the C(6) of glucose units of the cellulose into aldehyde and/or carboxy groups, a paper or nonwoven (product) made therefrom, in particular tissue (products) and a process for their manufacture. The paper or nonwoven (products) of the invention display excellent strength properties.
    Type: Grant
    Filed: August 16, 2001
    Date of Patent: November 30, 2004
    Assignees: SCA Hygiene Products GmbH, SCA Hygiene Products Zeist B.V.
    Inventors: Thomas Jaschinski, Susanna Gunnars, Arie Cornelis Besemer, Petter Bragd, Jan Matthijs Jetten, Ronald Van Den Dool, Willem Van Hartingsveldt
  • Process of oxidizing primary alcohols
    Patent number: 6770755
    Abstract: In a new process for oxidizing a primary and/or secondary alcohol, an oxidizing agent is used in the presence of a di-tertiary-alkyl nitroxyl, in an aqueous reaction medium at a pH of below 7. The di-tertiary-alkyl nitroxyl is especially 4-hydroxy-TEMPO, and the process is particularly advantageous for oxidizing carbohydrates such as starch.
    Type: Grant
    Filed: September 13, 2002
    Date of Patent: August 3, 2004
    Assignee: SCA Hygiene Products Zeist B.V.
    Inventors: Susanna Gunnars, Petter Bragd, Arie Cornelis Besemer, Thomas Jaschinski
  • Oxidized polymeric carbohydrates and products made thereof
    Publication number: 20040010137
    Abstract: The present invention relates to a polysaccharide having functional groups, wherein said groups are aldehyde groups formed at positions C2 and/or C3 as well as at position C6 of the anhydroglucose units of the polysaccharide chain. Preferably the polysaccharide is a cellulosic fibrous material whose primary and secondary hydroxyl groups of the cellulose are oxidized into aldehyde groups at least in part by means of TEMPO oxidation and periodate oxidation.
    Type: Application
    Filed: May 14, 2003
    Publication date: January 15, 2004
    Applicant: SCA HYGIENE PRODUCTS GMBH
    Inventors: Thomas Jaschinski, Susanna Gunnars, Arie Cornelis Besemer, Petter Bragd
  • Oxidized polymeric carbohydrates and products made thereof
    Patent number: 6635755
    Abstract: The present invention relates to a polysaccharide having functional groups, wherein said groups are aldehyde groups formed at positions C2 and/or C3 as well as at position C6 of the anhydroglucose units of the polysaccharide chain. Preferably the polysaccharide is a cellulosic fibrous material whose primary and secondary hydroxyl groups of the cellulose are oxidized into aldehyde groups at least in part by means of TEMPO oxidation and periodate oxidation. The invention also concerns a paper or nonwoven comprising the above polysaccharide. According to the invention a relative wet strength of more than 10% can be achieved.
    Type: Grant
    Filed: November 8, 2000
    Date of Patent: October 21, 2003
    Assignee: SCA Hygiene Products GmbH
    Inventors: Thomas Jaschinski, Susanna Gunnars, Arie Cornelis Besemer, Petter Bragd
  • Oxidized cellulose-containing fibrous materials and products made therefrom
    Publication number: 20020098317
    Abstract: The present invention relates to a cellulose-containing fibrous material, wherein hydroxy groups were oxidized at the C(6) of glucose units of the cellulose into aldehyde and/or carboxy groups, a paper or nonwoven (product) made therefrom, in particular tissue (products) a process for their manufacture. The paper or nonwoven (products) of the invention display excellent strength properties.
    Type: Application
    Filed: August 16, 2001
    Publication date: July 25, 2002
    Inventors: Thomas Jaschinski, Susanna Gunnars, Arie Cornelis Besemer, Petter Bragd, Jan Matthijs Jetten, Ronald Van Den Dool, Willem Van Hartingsveldt