Patents by Inventor Tarja Tamminen

Tarja Tamminen 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).

  • Publication number: 20210395466
    Abstract: The present invention relates to a process for the extraction of valuable components from a tannin-rich bark raw-material, by carrying out an alkaline cooking step, followed by acid precipitation to separate the valuable components from the remaining bark pulp. The invention also relates to the use of said process on a bark side stream of a chemical pulping plant, whereby the liquor remaining after the extraction of the present process is returned to a stream of the wood pulping process, typically to a black liquor stream, while the spent pulp can be processed further, e.g. by bleaching to give dissolved pulp.
    Type: Application
    Filed: October 23, 2019
    Publication date: December 23, 2021
    Inventors: Tarja Tamminen, Klaus Niemelä, Stina Grönqvist, Sami Alakurtti, Miikka Ruuskanen, Anna Kalliola
  • Publication number: 20180327311
    Abstract: According to an example aspect of the present invention, there is provided a dispersant comprising alkaline-O2 oxidized lignin. Such dispersant may be used for example in inorganic pigments to reduce interactions between pigment particles and lower the viscosity of pigment mixtures, and thereby positively affect for example to the loading of fillers and pigments in paints and coatings, paper and board, constructions materials, printing inks and plastics. Dispersants may also be used in aiding the inorganic pigment grinding in the pigment mine. Another suitable use is as a plasticizer or as a retardant agent for construction materials, such as gypsum.
    Type: Application
    Filed: November 7, 2016
    Publication date: November 15, 2018
    Inventors: Anna Kalliola, Tiina Liitiä, Tarja Tamminen, Tapio Vehmas
  • Patent number: 9902815
    Abstract: In this study, commercially available softwood lignin was esterified with tall oil fatty acid (TOFA) and tested as barrier material in fiber-based packaging material. The modified lignin samples were applied with a bar coater forming an even coating on the paperboard substrate. A significant decrease in WVTR and OTR value was observed for paperboard coated with the modified lignin as well as pure TOFA used as a reference. In contrast to the TOFA coating, the modified lignin coatings exhibited a high and stable contact angle. The coating material did not affect the tensile strength of the paperboard. According to the results, the demonstration of the conversion of lignin into a value added product has been shown. Furthermore, the novel coating material shows promising properties for the development as sustainable barrier material in fiber-based packaging material to replace oil-placed barriers.
    Type: Grant
    Filed: October 8, 2012
    Date of Patent: February 27, 2018
    Assignee: Teknologian tutkimuskeskus VTT Oy
    Inventors: Tarja Tamminen, Jarmo Ropponen, Eva-Lena Hult, Kristiina Poppius-Levlin
  • Patent number: 9676667
    Abstract: The present invention concerns a process for oxidizing lignin at alkaline conditions. This oxidized lignin can be used as a dispersant in various end-products, for example as a renewable plasticizer in cement-containing products, such as concrete, where the ability of the oxidized lignin to endure alkaline conditions is an advantage. Further, the invention concerns a concrete mixture containing aggregate, cement, water and a plasticizer formed of oxidized lignin, and a process for producing such a concrete mixture. The oxidized lignin can be manufactured using a process, where the lignin starting material is reacted with an oxidizing agent in solution in alkaline conditions.
    Type: Grant
    Filed: October 2, 2014
    Date of Patent: June 13, 2017
    Assignee: Teknologian tutkimuskeskus VTT Oy
    Inventors: Anna Kalliola, Tiina Liitiä, Tarja Tamminen, Tapio Vehmas
  • Publication number: 20160244364
    Abstract: The present invention concerns a process for oxidizing lignin at alkaline conditions. This oxidized lignin can be used as a dispersant in various end-products, for example as a renewable plasticizer in cement-containing products, such as concrete, where the ability of the oxidized lignin to endure alkaline conditions is an advantage. Further, the invention concerns a concrete mixture containing aggregate, cement, water and a plasticizer formed of oxidized lignin, and a process for producing such a concrete mixture. The oxidized lignin can be manufactured using a process, where the lignin starting material is reacted with an oxidizing agent in solution in alkaline conditions.
    Type: Application
    Filed: October 2, 2014
    Publication date: August 25, 2016
    Inventors: Anna Kalliola, Tiina Liitiä, Tarja Tamminen, Tapio Vehmas
  • Publication number: 20140243511
    Abstract: In this study, commercially available softwood lignin was esterified with tall oil fatty acid (TOFA) and tested as barrier material in fiber-based packaging material. The modified lignin samples were applied with a bar coater forming an even coating on the paperboard substrate. A significant decrease in WVTR and OTR value was observed for paperboard coated with the modified lignin as well as pure TOFA used as a reference. In contrast to the TOFA coating, the modified lignin coatings exhibited a high and stable contact angle. The coating material did not affect the tensile strength of the paperboard. According to the results, the demonstration of the conversion of lignin into a value added product has been shown. Furthermore, the novel coating material shows promising properties for the development as sustainable barrier material in fiber-based packaging material to replace oil-placed barriers.
    Type: Application
    Filed: October 8, 2012
    Publication date: August 28, 2014
    Inventors: Tarja Tamminen, Tarmo Ropponen, Eva-Lena Hult, Kristiina Poppius-Levlin
  • Publication number: 20030037893
    Abstract: Electrophotographic paper and a method for its production, according to which method a cellulose pulp is slushed, a filler is mixed with the slush, and the slush is formed in the paper machine into a web, which is dried. According to the invention, bivalent or trivalent cations in an amount of at least 0.1% of the dry weight of the pulp are attached to the acid groups of the cellulose pulp before the forming of the web. Thereby a paper web is obtained the surface charge of which is at least approximately 600 V when relative humidity is 40%. The surface charge of the paper according to the invention remains stable within a wide humidity range. For this reason, when the paper according to the invention is used, the need for drying the paper in the printing press is significantly reduced.
    Type: Application
    Filed: September 17, 2002
    Publication date: February 27, 2003
    Inventors: Sami Simula, Tarja Tamminen, Kaarlo Niskanen