Patents by Inventor Naoya Ichikawa

Naoya Ichikawa 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: 20220240352
    Abstract: An electrically heating support includes: a pillar shaped honeycomb structure including: an outer peripheral wall; and a partition wall disposed on an inner side of the outer peripheral wall, the partition wall defining a plurality of cells, each of the plurality of cells extending from one end face to the other end face to form a flow path; and a pair of electrode layers disposed so as to face each other across a central axis of the honeycomb structure, each of the electrode layers being disposed on a surface of the outer peripheral wall of the honeycomb structure; and a metal terminal provided on each of the electrode layers. The honeycomb structure includes a ceramic having a PTC property, and the electrode layers include a ceramic having an NTC property.
    Type: Application
    Filed: April 15, 2022
    Publication date: July 28, 2022
    Applicant: NGK Insulators, Ltd.
    Inventors: Yukiharu MORITA, Naoya TAKASE, Yoshiyuki KASAI, Tatsushi ICHIKAWA
  • Patent number: 9758707
    Abstract: The present invention provides a tire puncture sealant which exhibits excellent storage stability while having reduced low-temperature viscosity and therefore improved low-temperature injection properties, and also exhibits excellent initial sealing properties and sealing force retention properties. The present invention relates to a tire puncture sealant containing rubber latex and 1,3-propanediol, the 1,3-propanediol being present in a proportion of 55 to 61% by mass of the liquid component.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: September 12, 2017
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Naoya Ichikawa
  • Patent number: 9657313
    Abstract: The invention relates to an isoprene oligomer that contains a trans structural moiety and a cis structural moiety, which can be represented by the following formula (1), wherein at least 1 atom or group in the trans structural moiety is replaced by another atom or group. The invention also relates to a polyisoprene, which is biosynthesized using the isoprene oligomer and isopentenyl diphosphate. Further, this invention provides a rubber composition comprising the isoprene oligomer and/or the polyisoprene, and a pneumatic tire, including tire components (e.g., treads and sidewalls) formed from the rubber composition.
    Type: Grant
    Filed: April 19, 2016
    Date of Patent: May 23, 2017
    Assignees: SUMITOMO RUBBER INDUSTRIES, LTD., YAMAGATA UNIVERSITY
    Inventors: Yukino Miyagi, Naoya Ichikawa, Norimasa Ohya
  • Patent number: 9617442
    Abstract: Provided is a tire puncture sealant having improved puncture sealing performance while showing excellent storage stability. The present invention relates to a tire puncture sealant including: rubber latex, a tackifying resin emulsion, and a rosin acid surfactant.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: April 11, 2017
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Naoya Ichikawa
  • Patent number: 9481783
    Abstract: The present invention provides rubber compositions for tires which are capable of improving handling stability, fuel efficiency, and processability while sufficiently reducing the dependence on petroleum resources, and pneumatic tires including tire components (e.g. bead apex) formed from the rubber compositions for tires. The present invention relates to rubber compositions for tires, containing a rubber component and a naturally derived phenolic resin.
    Type: Grant
    Filed: August 2, 2012
    Date of Patent: November 1, 2016
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Yukio Isobe, Takao Wada, Takayuki Hattori, Naoya Ichikawa
  • Patent number: 9410033
    Abstract: The present invention provides a rubber composition for an undertread, which has improved in processability, fuel economy, and tensile properties in a balanced manner, and also provides a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition for an undertread, including: a rubber component containing a modified natural rubber having a phosphorus content of 200 ppm or less; and carbon black and/or a white filler, wherein the modified natural rubber is contained in an amount of 5% by mass or more per 100% by mass of the rubber component.
    Type: Grant
    Filed: September 11, 2014
    Date of Patent: August 9, 2016
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Yoshihiro Kagawa, Naoya Ichikawa
  • Publication number: 20160222418
    Abstract: The invention relates to an isoprene oligomer that contains a trans structural moiety and a cis structural moiety, which can be represented by the following formula (1), wherein at least 1 atom or group in the trans structural moiety is replaced by another atom or group. The invention also relates to a polyisoprene, which is biosynthesized using the isoprene oligomer and isopentenyl diphosphate. Further, this invention provides a rubber composition comprising the isoprene oligomer and/or the polyisoprene, and a pneumatic tire, including tire components (e.g., treads and sidewalls) formed from the rubber composition.
    Type: Application
    Filed: April 19, 2016
    Publication date: August 4, 2016
    Applicants: SUMITOMO RUBBER INDUSTRIES, LTD., YAMAGATA UNIVERSITY
    Inventors: Yukino MIYAGI, Naoya ICHIKAWA, Norimasa OHYA
  • Patent number: 9371342
    Abstract: The invention relates to an isoprene oligomer that contains a trans structural moiety and a cis structural moiety, which can be represented by the following formula (1), wherein at least 1 atom or group in the trans structural moiety is replaced by another atom or group. The invention also relates to a polyisoprene, which is biosynthesized using the isoprene oligomer and isopentenyl diphosphate. Further, this invention provides a rubber composition comprising the isoprene oligomer and/or the polyisoprene, and a pneumatic tire, including tire components (e.g., treads and sidewalls) formed from the rubber composition.
    Type: Grant
    Filed: June 28, 2011
    Date of Patent: June 21, 2016
    Assignees: SUMITOMO RUBBER INDUSTRIES, LTD., YAMAGATA UNIVERSITY
    Inventors: Yukino Miyagi, Naoya Ichikawa, Norimasa Ohya
  • Patent number: 9334427
    Abstract: The present invention provides a puncture sealant for tires capable of achieving improved injectability while having excellent initial sealing performance and seal retention performance. The puncture sealant includes rubber latex, a tackifier, an antifreezing agent, and a thixotropy-imparting agent.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: May 10, 2016
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Naoya Ichikawa
  • Publication number: 20150344743
    Abstract: The present invention provides a puncture sealant for tires capable of achieving improved injectability while having excellent initial sealing performance and seal retention performance. The puncture sealant includes rubber latex, a tackifier, an antifreezing agent, and a thixotropy-imparting agent.
    Type: Application
    Filed: June 26, 2013
    Publication date: December 3, 2015
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Naoya ICHIKAWA
  • Publication number: 20150337155
    Abstract: Provided is a tire puncture sealant having improved puncture sealing performance while showing excellent storage stability. The present invention relates to a tire puncture sealant including: rubber latex, a tackifying resin emulsion, and a rosin acid surfactant.
    Type: Application
    Filed: June 26, 2013
    Publication date: November 26, 2015
    Inventor: Naoya ICHIKAWA
  • Patent number: 9181355
    Abstract: The present invention provides a modified natural rubber having a reduced tan ?, a method for producing the modified natural rubber, a rubber composition produced using the modified natural rubber, and a pneumatic tire produced using the rubber composition. The present invention also provides a modified natural rubber having a reduced tan ?, a method for producing the modified natural rubber, a rubber composition produced using the modified natural rubber and achieving good fuel economy and abrasion resistance at the same time, and a pneumatic tire produced using the rubber composition. The present invention relates to a modified natural rubber having a phosphorus content of 200 ppm or less and a total content of sodium and potassium of 350 ppm or less. The invention also relates to a modified natural rubber having a phosphorus content of 200 ppm or less and a nitrogen content of 0.2% by mass or less.
    Type: Grant
    Filed: June 9, 2011
    Date of Patent: November 10, 2015
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Naoya Ichikawa, Toshiaki Sakaki, Lucksanaporn Tarachiwin, Kamalin Kanyawararak
  • Publication number: 20150175781
    Abstract: The present invention provides rubber compositions for tires which are capable of improving handling stability, fuel efficiency, and processability while sufficiently reducing the dependence on petroleum resources, and pneumatic tires including tire components (e.g. bead apex) formed from the rubber compositions for tires. The present invention relates to rubber compositions for tires, containing a rubber component and a naturally derived phenolic resin.
    Type: Application
    Filed: August 2, 2012
    Publication date: June 25, 2015
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Yukio Isobe, Takao Wada, Takayuki Hattori, Naoya Ichikawa
  • Publication number: 20150175862
    Abstract: The present invention provides a tire puncture sealant which exhibits excellent storage stability while having reduced low-temperature viscosity and therefore improved low-temperature injection properties, and also exhibits excellent initial sealing properties and sealing force retention properties. The present invention relates to a tire puncture sealant containing rubber latex and 1,3-propanediol, the 1,3-propanediol being present in a proportion of 55 to 61% by mass of the liquid component.
    Type: Application
    Filed: August 20, 2013
    Publication date: June 25, 2015
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Naoya Ichikawa
  • Publication number: 20140378593
    Abstract: The present invention provides a rubber composition for an undertread, which has improved in processability, fuel economy, and tensile properties in a balanced manner, and also provides a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition for an undertread, including: a rubber component containing a modified natural rubber having a phosphorus content of 200 ppm or less; and carbon black and/or a white filler, wherein the modified natural rubber is contained in an amount of 5% by mass or more per 100% by mass of the rubber component.
    Type: Application
    Filed: September 11, 2014
    Publication date: December 25, 2014
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Yoshihiro KAGAWA, Naoya ICHIKAWA
  • Patent number: 8875765
    Abstract: The present invention provides a rubber composition for a clinch apex which improves in fuel economy, flex crack growth resistance, and processability in a balanced manner, and also provides a pneumatic tire produced using the rubber composition. The present invention relates to a rubber composition for a clinch apex, including: a modified natural rubber having a phosphorus content of 200 ppm or less; and at least one of carbon black and a white filler.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: November 4, 2014
    Assignee: Sumitomo Rubber Industries, Ltd.
    Inventors: Isamu Tsumori, Naoya Ichikawa
  • Patent number: 8857482
    Abstract: The present invention provides a rubber composition for a tread which enables improvement in fuel economy, breaking performance, and abrasion resistance in a balanced manner; a method for producing the rubber composition; and a heavy-load tire. The present invention relates to a rubber composition for a tread of a heavy-load tire, including a modified natural rubber having a phosphorus content of 200 ppm or less, and carbon black.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: October 14, 2014
    Assignee: Sumitomo Rubber Industries, Ltd.
    Inventors: Takafumi Taguchi, Naoya Ichikawa
  • Patent number: 8813798
    Abstract: A rubber composition for a tire, and a pneumatic tire are provided in which the fuel economy, abrasion resistance, and deterioration resistance can be improved in a good balance. The present invention relates to a rubber composition for a tire, containing a rubber component that contains: a modified natural rubber having a phosphorus content of not more than 200 ppm; and butadiene rubber, wherein 60 to 95% by mass of the modified natural rubber and 5 to 40% by mass of the butadiene rubber are contained based on 100% by mass of the rubber component.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: August 26, 2014
    Assignee: Sumitomo Rubber Industries, Ltd.
    Inventors: Isamu Tsumori, Naoya Ichikawa
  • Patent number: 8809450
    Abstract: The present invention provides a modified natural rubber which simultaneously achieves good fuel economy and good heat-aging resistance, and the production method thereof. The present invention also provides a tire rubber composition and a pneumatic tire which are produced using the modified natural rubber. The present invention relates to a modified natural rubber which is obtainable by treating a rubber coagulated from a saponified natural rubber latex, with a basic compound and then with an acidic compound.
    Type: Grant
    Filed: January 13, 2012
    Date of Patent: August 19, 2014
    Assignee: Sumitomo Rubber Industries, Ltd.
    Inventors: Toshiaki Sakaki, Naoya Ichikawa, Masako Iwamoto
  • Publication number: 20140194578
    Abstract: A rubber composition for a tire, and a pneumatic tire are provided in which the fuel economy, abrasion resistance, and deterioration resistance can be improved in a good balance. The present invention relates to a rubber composition for a tire, containing a rubber component that contains: a modified natural rubber having a phosphorus content of not more than 200 ppm; and butadiene rubber, wherein 60 to 95% by mass of the modified natural rubber and 5 to 40% by mass of the butadiene rubber are contained based on 100% by mass of the rubber component.
    Type: Application
    Filed: March 13, 2014
    Publication date: July 10, 2014
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Isamu TSUMORI, Naoya ICHIKAWA