Patents by Inventor Kouhei Ohkawa

Kouhei Ohkawa 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).

  • Diguanamines and preparation process, derivatives and use thereof
    Patent number: 5869184
    Abstract: Provided by the present invention are novel diguanamine derivatives, led by 2,5/2,6-bis(4,6-diamino-1,3,5-triazin-2-yl)-bicyclo?2.2.l!heptanes and 1,3/1,4-bis(4,6-diamino-1,3,5-triazin-2-yl)-cyclo-hexanes, and derivatives thereof, applications of these compounds in fields such as adhesives and paints, utilization of these compounds in flame-retarding, thermal stabilization and compatibilization methods of resins, thermosetting molding compositions and thermosetting expansion-molding compositions making use of these compounds, as well as polymeric microspheres also using these compounds. These compounds are expected to find wide spread industrial utility as various excellent properties can be obtained by using them.
    Type: Grant
    Filed: February 14, 1997
    Date of Patent: February 9, 1999
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Tetsuya Oishi, Jin Suzuki, Kouhei Ohkawa, Satoshi Furusawa, Hiroshi Ono, Kazuo Sugazaki
  • Diguanamines and preparation process, derivatives and use thereof
    Patent number: 5744504
    Abstract: Provided by the present invention are novel diguanamine derivatives, led by 2,5/2,6-bis(4,6-diamino-1,3,5-triazin-2-yl)-bicyclo?2.2.1!heptanes and 1,3/1,4-bis(4,6-diamino-1,3,5-triazin-2-yl)-cyclohexanes, and derivatives thereof, applications of these compounds in fields such as adhesives and paints, utilization of these compounds in flame-retarding, thermal stabilization and compatibilization methods of resins, thermosetting molding compositions and thermosetting expansion-molding compositions making use of these compounds, as well as polymeric microspheres also using these compounds. These compounds are expected to find wide spread industrial utility as various excellent properties can be obtained by using them.
    Type: Grant
    Filed: February 14, 1997
    Date of Patent: April 28, 1998
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Tetsuya Oishi, Jin Suzuki, Kouhei Ohkawa, Satoshi Furusawa, Hiroshi Ono
  • Diguanamines and preparation process, derivatives and use thereof
    Patent number: 5648446
    Abstract: Provided by the present invention are novel diguanamine derivatives, led by 2,5/2,6-bis(4,6-diamino-1,3,5-triazin-2-yl)-bicyclo[2.2.1]heptanes and 1,3/1,4-bis(4,6-diamino-1,3,5-triazin-2-yl)-cyclohexanes, and derivatives thereof, applications of these compounds in fields such as adhesives and paints, utilization of these compounds in flame-retarding, thermal stabilization and compatibilization methods of resins, thermosetting molding compositions and thermosetting expansion-molding compositions making use of these compounds, as well as polymeric microspheres also using these compounds. These compounds are expected to find wide spread industrial utility as various excellent properties can be obtained by using them.
    Type: Grant
    Filed: March 30, 1995
    Date of Patent: July 15, 1997
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Tetsuya Oishi, Jin Suzuki, Kouhei Ohkawa, Hiroshi Ono
  • Diguanamines and preparation process, derivatives and use thereof
    Patent number: 5646240
    Abstract: Provided by the present invention are novel diguanamine derivatives, led by 2,5/2,6-bis(4,6-diamino-1,3,5-triazin-2-yl)-bicyclo[2.2.1]heptanes and 1,3/1,4-bis(4,6-diamino-1,3,5-triazin-2-yl)-cyclohexanes, and derivatives thereof, applications of these compounds in fields such as adhesives and paints, utilization of these compounds in flame-retarding, thermal stabilization and compatibilization methods of resins, thermosetting molding compositions and thermosetting expansion-molding compositions making use of these compounds, as well as polymeric microspheres also using these compounds. These compounds are expected to find wide spread industrial utility as various excellent properties can be obtained by using them.
    Type: Grant
    Filed: March 21, 1996
    Date of Patent: July 8, 1997
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Tetsuya Oishi, Jin Suzuki, Kouhei Ohkawa, Hiroshi Ono
  • Diguanamines and preparation process, derivatives and use thereof
    Patent number: 5569726
    Abstract: Provided by the present invention are novel diguanamine derivatives, led by 2,5/2,6-bis(4,6-diamino-1,3,5-triazin-2-yl)-bicyclo[2.2.1]heptanes and 1,3/1,4-bis(4,6-diamino-1,3,5-triazin-2-yl)-cyclohexanes, and derivatives thereof, applications of these compounds in fields such as adhesives and paints, utilization of these compounds in flame-retarding, thermal stabilization and compatibilization methods of resins, thermosetting molding compositions and thermosetting expansion-molding compositions making use of these compounds, as well as polymeric microspheres also using these compounds. These compounds are expected to find wide spread industrial utility as various excellent properties can be obtained by using them.
    Type: Grant
    Filed: March 30, 1995
    Date of Patent: October 29, 1996
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Tetsuya Oishi, Jin Suzuki, Kouhei Ohkawa, Satoshi Furusawa, Hiroshi Ono, Kazuo Sugazaki
  • Diguanamines and preparation process, derivatives and use thereof
    Patent number: 5545702
    Abstract: Provided by the present invention are novel diguanamine derivatives, led by 2,5/2,6-bis(4,6-diamino-1,3,5-triazin-2-yl)-bicyclo[2.2.1]heptanes and 1,3/1,4-bis(4,6-diamino-1,3,5-triazin-2-yl)-cyclohexanes, and derivatives thereof, applications of these compounds in fields such as adhesives and paints, utilization of these compounds in flame-retarding, thermal stabilization and compatibilization methods of resins, thermosetting molding compositions and thermosetting expansion-molding compositions making use of these compounds, as well as polymeric microspheres also using these compounds. These compounds are expected to find wide spread industrial utility as various excellent properties can be obtained by using them.
    Type: Grant
    Filed: October 3, 1995
    Date of Patent: August 13, 1996
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Tetsuya Oishi, Hiroshi Ozawa, Minato Karasawa, Masamitsu Inomata, Izumi Mega, Atsuyoshi Yamauchi, Kazunori Kamada, Shigeru Nakahata, Katsumi Sakamoto, Tatsunobu Nakashima, Akito Watanabe, Jin Suzuki, Kouhei Ohkawa, Satoshi Furusawa, Hiroshi Ono, Kazuo Sugazaki
  • Diguanamines and preparation process, derivatives and use thereof
    Patent number: 5480947
    Abstract: Provided by the present invention are novel diguanamine derivatives, led by 2,5/2,6-bis(4,6-diamino-1,3,5-triazin-2-yl)-bicyclo[2.2.1]heptanes and 1,3/1,4-bis(4,6-diamino-1,3,5-triazin-2-yl)-cyclohexanes, and derivatives thereof, applications of these compounds in fields such as adhesives and paints, utilization of these compounds in flame-retarding, thermal stabilization and compatibilization methods of resins, thermosetting molding compositions and thermosetting expansion-molding compositions making use of these compounds, as well as polymeric microspheres also using these compounds. These compounds are expected to find wide spread industrial utility as various excellent properties can be obtained by using them.
    Type: Grant
    Filed: March 30, 1995
    Date of Patent: January 2, 1996
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Tetsuya Oishi, Hiroshi Ozawa, Minato Karasawa, Masamitsu Inomata, Izumi Mega, Atsuyoshi Yamauchi, Kazunori Kamada, Shigeru Nakahata, Katsumi Sakamoto, Tatsunobu Nakashima, Akito Watanabe, Jin Suzuki, Kouhei Ohkawa, Satoshi Furusawa, Hiroshi Ono, Kazuo Sugazaki