Patents by Inventor Heikki Ruohonen

Heikki Ruohonen 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).

  • Conductive plastics material and a method for its preparation
    Patent number: 5585038
    Abstract: The invention relates to a conductive polymer complex which contains a polyaniline or derivative thereof doped with a protonic acid. By the method according to the invention, a conductive polymer is obtained having substantially reduced acidity, sufficiently high conductivity level, and which is suitable, for example, for being melt processed in conventional plastics processing apparatus. The acidity of the conductive polymer can be reduced by having the conductive polymer contain both a metal compound and an additionally neutralizing compound. The obtained conductive polymer material, having a pH value of approximately 3-8, can be mixed with an insulating polymer to produce a conductive plastics mixture. The invention also relates to a method of preparing a conductive polymer that is more processable by incorporating therein a plasticizing agent selected from the group consisting of water, a C.sub.1 -C.sub.3 alcohol, and mixtures thereof.
    Type: Grant
    Filed: June 3, 1994
    Date of Patent: December 17, 1996
    Assignee: Neste Oy
    Inventors: Pauli Kirmanen, Esko Savolainen, Esa Virtanen, Toivo K arn a, Jukka Laakso, Heikki Ruohonen, Kimmo V akiparta, Olli Ikkala, Hannele J arvinen
  • Conductive plastics material and a method for its preparation
    Patent number: 5585040
    Abstract: The invention relates to a conductive polymer complex which contains a polyaniline or derivative thereof doped with a protonic acid. By the method according to the invention, a conductive polymer is obtained having substantially reduced acidity, sufficiently high conductivity level, and which is suitable, for example, for being melt processed in conventional plastics processing apparatus. The acidity of the conductive polymer can be reduced by having the conductive polymer contain both a metal compound and an additionally neutralizing compound. The obtained conductive polymer material, having a pH value of approximately 3-8, can be mixed with an insulating polymer to produce a conductive plastics mixture. The invention also relates to a method of preparing a conductive polymer that is more processable by incorporating therein a plasticizing agent selected from the group consisting of water, a C.sub.1 -C.sub.3 alcohol, and mixtures thereof.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: December 17, 1996
    Assignee: Neste Oy
    Inventors: Pauli Kirmanen, Esko Savolainen, Esa Virtanen, Toivo Karna, Jukka Laakso, Heikki Ruohonen, Kimmo Vakiparta, Olli Ikkala, Hannele Jarvinen
  • Metal compound/protonic acid containing electrically conductive compositions and methods for their preparation
    Patent number: 5531932
    Abstract: Compositions and methods are described that relate to the use of reaction products of metal compounds and protonic acids for plasticizing and neutralizing acidic, protonated compositions comprising substituted and unsubstituted polyanilines and co-polymers and or mixtures thereof; and for reducing the percolation threshold for conductivity in blends with insulating bulk polymers.
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: July 2, 1996
    Assignee: Neste Oy
    Inventors: Toivo Karna, Jukka Laakso, Timo Niemi, Heikki Ruohonen, Esko Savolainen, Helge Lindstrom, Esa Virtanen, Olli Ikkala
  • Electrically conductive compositions and methods for their preparation
    Patent number: 5340499
    Abstract: Compositions and methods are described that relate to the use of reaction products of metal compounds and protonic acids for plasticizing and neutralizing acidic, protonated compositions comprising substituted and unsubstituted polyanilines and co-polymers and or mixtures thereof; and for reducing the percolation threshold for conductivity in blends with insulating bulk polymers.
    Type: Grant
    Filed: August 11, 1992
    Date of Patent: August 23, 1994
    Assignee: Neste Oy
    Inventors: Toivo Karna, Jukka Laakso, Timo Niemi, Heikki Ruohonen, Esko Savolainen, Helge Lindstrom, Esa Virtanen, Olli Ikkala, Alejandro Andreatta