Patents by Inventor Eiji Akiyama

Eiji Akiyama 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).

  • Patent number: 8400703
    Abstract: An optical switch for switching between transmission and total reflection of incident light 101 applied to electro-optical crystal 104 by applying an electric field to electro-optical crystal 104 to thereby change the refractive index of electro-optical crystal 104 includes a plurality of electrodes 105 disposed in electro-optical crystal 104 to provide electrode assembly 106 for applying the electric field to electro-optical crystal 104. Electro-optical crystal 104 has a refractive index changing portion (not shown) whose refractive index is changed by the electric field applied by electrode assembly 106, the refractive index changing portion enclosing electrode assembly 106 in its entirety. The refractive index changing portion has a flat refractive index boundary.
    Type: Grant
    Filed: June 18, 2008
    Date of Patent: March 19, 2013
    Assignee: NEC Corporation
    Inventors: Eiji Akiyama, Fujio Okumura, Osamu Ishibashi
  • Patent number: 8299006
    Abstract: The present invention provides a refrigerating machine oil, a compressor oil composition, a hydraulic oil composition, a metalworking oil composition, a heat treating oil composition, a lubricating oil composition for machine tools and a lubricating oil composition which comprise a lubricating oil base oil having % CA of not more than 2, % CP/% CN of not less than 6 and an iodine value of not more than 2.5.
    Type: Grant
    Filed: November 1, 2011
    Date of Patent: October 30, 2012
    Assignee: Nippon Oil Corporation
    Inventors: Kazuo Tagawa, Yuji Shimomura, Ken Sawada, Katsuya Takigawa, Toshio Yoshida, Shinichi Mitsumoto, Eiji Akiyama, Junichi Shibata, Satoshi Suda, Hideo Yokota, Masahiro Hata, Hiroyuki Hoshino, Hajime Nakao, Shozaburo Konishi
  • Patent number: 8247360
    Abstract: The present invention provides a refrigerating machine oil, a compressor oil composition, a hydraulic oil composition, a metalworking oil composition, a heat treating oil composition, a lubricating oil composition for machine tools and a lubricating oil composition which comprise a lubricating oil base oil having % CA of not more than 2, % CP/% CN of not less than 6 and an iodine value of not more than 2.5.
    Type: Grant
    Filed: November 1, 2011
    Date of Patent: August 21, 2012
    Assignee: Nippon Oil Corporation
    Inventors: Kazuo Tagawa, Yuji Shimomura, Ken Sawada, Katsuya Takigawa, Toshio Yoshida, Shinichi Mitsumoto, Eiji Akiyama, Junichi Shibata, Satoshi Suda, Hideo Yokota, Masahiro Hata, Hiroyuki Hoshino, Hajime Nakao, Shozaburo Konishi
  • Patent number: 8236740
    Abstract: The present invention provides a refrigerating machine oil, a compressor oil composition, a hydraulic oil composition, a metalworking oil composition, a heat treating oil composition, a lubricating oil composition for machine tools and a lubricating oil composition which comprise a lubricating oil base oil having % CA of not more than 2, % CP/% CN of not less than 6 and an iodine value of not more than 2.5.
    Type: Grant
    Filed: November 1, 2011
    Date of Patent: August 7, 2012
    Assignee: Nippon Oil Corporation
    Inventors: Kazuo Tagawa, Yuji Shimomura, Ken Sawada, Katsuya Takigawa, Toshio Yoshida, Shinichi Mitsumoto, Eiji Akiyama, Junichi Shibata, Satoshi Suda, Hideo Yokota, Masahiro Hata, Hiroyuki Hoshino, Hajime Nakao, Shozaburo Konishi
  • Patent number: 8232233
    Abstract: The present invention provides a refrigerating machine oil, a compressor oil composition, a hydraulic oil composition, a metalworking oil composition, a heat treating oil composition, a lubricating oil composition for machine tools and a lubricating oil composition which comprise a lubricating oil base oil having % CA of not more than 2, % CP/% CN of not less than 6 and an iodine value of not more than 2.5.
    Type: Grant
    Filed: November 1, 2011
    Date of Patent: July 31, 2012
    Assignee: Nippon Oil Corporation
    Inventors: Kazuo Tagawa, Yuji Shimomura, Ken Sawada, Katsuya Takigawa, Toshio Yoshida, Shinichi Mitsumoto, Eiji Akiyama, Junichi Shibata, Satoshi Suda, Hideo Yokota, Masahiro Hata, Hiroyuki Hoshino, Hajime Nakao, Shozaburo Konishi
  • Patent number: 8227387
    Abstract: The present invention provides a refrigerating machine oil, a compressor oil composition, a hydraulic oil composition, a metalworking oil composition, a heat treating oil composition, a lubricating oil composition for machine tools and a lubricating oil composition which comprise a lubricating oil base oil having % CA of not more than 2, % CP/% CN of not less than 6 and an iodine value of not more than 2.5.
    Type: Grant
    Filed: November 1, 2011
    Date of Patent: July 24, 2012
    Assignee: Nippon Oil Corporation
    Inventors: Kazuo Tagawa, Yuji Shimomura, Ken Sawada, Katsuya Takigawa, Toshio Yoshida, Shinichi Mitsumoto, Eiji Akiyama, Junichi Shibata, Satoshi Suda, Hideo Yokota, Masahiro Hata, Hiroyuki Hoshino, Hajime Nakao, Shozaburo Konishi
  • Patent number: 8227388
    Abstract: The present invention provides a refrigerating machine oil, a compressor oil composition, a hydraulic oil composition, a metalworking oil composition, a heat treating oil composition, a lubricating oil composition for machine tools and a lubricating oil composition which comprise a lubricating oil base oil having % CA of not more than 2, % CP/% CN of not less than 6 and an iodine value of not more than 2.5.
    Type: Grant
    Filed: November 1, 2011
    Date of Patent: July 24, 2012
    Assignee: Nippon Oil Corporation
    Inventors: Kazuo Tagawa, Yuji Shimomura, Ken Sawada, Katsuya Takigawa, Toshio Yoshida, Shinichi Mitsumoto, Eiji Akiyama, Junichi Shibata, Satoshi Suda, Hideo Yokota, Masahiro Hata, Hiroyuki Hoshino, Hajime Nakao, Shozaburo Konishi
  • Patent number: 8193129
    Abstract: The present invention provides a refrigerating machine oil, a compressor oil composition, a hydraulic oil composition, a metalworking oil composition, a heat treating oil composition, a lubricating oil composition for machine tools and a lubricating oil composition which comprise a lubricating oil base oil having % CA of not more than 2, % CP/% CN of not less than 6 and an iodine value of not more than 2.5.
    Type: Grant
    Filed: July 3, 2007
    Date of Patent: June 5, 2012
    Assignee: Nippon Oil Corporation
    Inventors: Kazuo Tagawa, Yuji Shimomura, Ken Sawada, Katsuya Takigawa, Toshio Yoshida, Shinichi Mitsumoto, Eiji Akiyama, Junichi Shibata, Satoshi Suda, Hideo Yokota, Masahiro Hata, Hiroyuki Hoshino, Hajime Nakao, Shozaburo Konishi
  • Publication number: 20120053097
    Abstract: The present invention provides a refrigerating machine oil, a compressor oil composition, a hydraulic oil composition, a metalworking oil composition, a heat treating oil composition, a lubricating oil composition for machine tools and a lubricating oil composition which comprise a lubricating oil base oil having % CA of not more than 2, % CP/% CN of not less than 6 and an iodine value of not more than 2.5.
    Type: Application
    Filed: November 1, 2011
    Publication date: March 1, 2012
    Inventors: Kazuo Tagawa, Yuji Shimomura, Ken Sawada, Katsuya Takigawa, Toshio Yoshida, Shinichi Mitsumoto, Eiji Akiyama, Junichi Shibata, Satoshi Suda, Hideo Yokota, Masahiro Hata, Hiroyuki Hoshino, Hajime Nakao, Shozaburo Konishi
  • Publication number: 20120053096
    Abstract: The present invention provides a refrigerating machine oil, a compressor oil composition, a hydraulic oil composition, a metalworking oil composition, a heat treating oil composition, a lubricating oil composition for machine tools and a lubricating oil composition which comprise a lubricating oil base oil having % CA of not more than 2, % CP/% CN of not less than 6 and an iodine value of not more than 2.5.
    Type: Application
    Filed: November 1, 2011
    Publication date: March 1, 2012
    Inventors: Kazuo Tagawa, Yuji Shimomura, Ken Sawada, Katsuya Takigawa, Toshio Yoshida, Shinichi Mitsumoto, Eiji Akiyama, Junichi Shibata, Satoshi Suda, Hideo Yokota, Masahiro Hata, Hiroyuki Hoshino, Hajime Nakao, Shozaburo Konishi
  • Publication number: 20120053094
    Abstract: The present invention provides a refrigerating machine oil, a compressor oil composition, a hydraulic oil composition, a metalworking oil composition, a heat treating oil composition, a lubricating oil composition for machine tools and a lubricating oil composition which comprise a lubricating oil base oil having % CA of not more than 2, % CP/% CN of not less than 6 and an iodine value of not more than 2.5.
    Type: Application
    Filed: November 1, 2011
    Publication date: March 1, 2012
    Inventors: Kazuo Tagawa, Yuji Shimomura, Ken Sawada, Katsuya Takigawa, Toshio Yoshida, Shinichi Mitsumoto, Eiji Akiyama, Junichi Shibata, Satoshi Suda, Hideo Yokota, Masahiro Hata, Hiroyuki Hoshino, Hajime Nakao, Shozaburo Konishi
  • Publication number: 20120053102
    Abstract: The present invention provides a refrigerating machine oil, a compressor oil composition, a hydraulic oil composition, a metalworking oil composition, a heat treating oil composition, a lubricating oil composition for machine tools and a lubricating oil composition which comprise a lubricating oil base oil having % CA of not more than 2, % CP/% CN of not less than 6 and an iodine value of not more than 2.5.
    Type: Application
    Filed: November 1, 2011
    Publication date: March 1, 2012
    Inventors: Kazuo Tagawa, Yuji Shimomura, Ken Sawada, Katsuya Takigawa, Toshio Yoshida, Shinichi Mitsumoto, Eiji Akiyama, Junichi Shibata, Satoshi Suda, Hideo Yokota, Masahiro Hata, Hiroyuki Hoshino, Hajime Nakao, Shozaburo Konishi
  • Publication number: 20120053375
    Abstract: The present invention provides a refrigerating machine oil, a compressor oil composition, a hydraulic oil composition, a metalworking oil composition, a heat treating oil composition, a lubricating oil composition for machine tools and a lubricating oil composition which comprise a lubricating oil base oil having % CA of not more than 2, % CP/% CN of not less than 6 and an iodine value of not more than 2.5.
    Type: Application
    Filed: November 1, 2011
    Publication date: March 1, 2012
    Inventors: Kazuo Tagawa, Yuji Shimomura, Ken Sawada, Katsuya Takigawa, Toshio Yoshida, Shinichi Mitsumoto, Eiji Akiyama, Junichi Shibata, Satoshi Suda, Hideo Yokota, Masahiro Hata, Hiroyuki Hoshino, Hajime Nakao, Shozaburo Konishi
  • Publication number: 20120046205
    Abstract: The present invention provides a refrigerating machine oil, a compressor oil composition, a hydraulic oil composition, a metalworking oil composition, a heat treating oil composition, a lubricating oil composition for machine tools and a lubricating oil composition which comprise a lubricating oil base oil having % CA of not more than 2, % CP/% CN of not less than 6 and an iodine value of not more than 2.5.
    Type: Application
    Filed: November 1, 2011
    Publication date: February 23, 2012
    Inventors: Kazuo Tagawa, Yuji Shimomura, Ken Sawada, Katsuya Takigawa, Toshio Yoshida, Shinichi Mitsumoto, Eiji Akiyama, Junichi Shibata, Satoshi Suda, Hideo Yokota, Masahiro Hata, Hiroyuki Hoshino, Hajime Nakao, Shozaburo Konishi
  • Publication number: 20100182672
    Abstract: An optical switch for switching between transmission and total reflection of incident light 101 applied to electro-optical crystal 104 by applying an electric field to electro-optical crystal 104 to thereby change the refractive index of electro-optical crystal 104 includes a plurality of electrodes 105 disposed in electro-optical crystal 104 to provide electrode assembly 106 for applying the electric field to electro-optical crystal 104. Electro-optical crystal 104 has a refractive index changing portion (not shown) whose refractive index is changed by the electric field applied by electrode assembly 106, the refractive index changing portion enclosing electrode assembly 106 in its entirety. The refractive index changing portion has a flat refractive index boundary.
    Type: Application
    Filed: June 18, 2008
    Publication date: July 22, 2010
    Applicant: NEC Corporation
    Inventors: Eiji Akiyama, Fujio Okumura, Osamu Ishibashi
  • Publication number: 20100093568
    Abstract: The present invention provides a refrigerating machine oil, a compressor oil composition, a hydraulic oil composition, a metalworking oil composition, a heat treating oil composition, a lubricating oil composition for machine tools and a lubricating oil composition which comprise a lubricating oil base oil having % CA of not more than 2, % CP/% CN of not less than 6 and an iodine value of not more than 2.5.
    Type: Application
    Filed: July 3, 2007
    Publication date: April 15, 2010
    Inventors: Kazuo Tagawa, Yuji Shimomura, Ken Sawada, Katsuya Takigawa, Toshio Yoshida, Shinichi Mitsimoto, Eiji Akiyama, Junichi Shibata, Satoshi Suda, Hideo Yokota, Masahiro Hata, Hiroyuki Hoshino, Hajime Nakao, Shozaburo Konishi
  • Patent number: 7678485
    Abstract: The operability of a fuel cell which uses a fuel cartridge housing a liquid fuel is improved. A fuel cartridge 1400 houses a liquid fuel 124. The fuel cartridge 1400 includes a gas-liquid separation film 1408 which divides a fuel housing section 1402 into a liquid housing chamber 1402a and a gas housing chamber 1402b. A fuel gas, which is the vaporized liquid fuel, is housed in the gas housing chamber 1402b. A gas exhaust pipe 1410 is connected to the gas housing chamber 1402b, and the fuel gas housed in the gas housing chamber 1402b is discharged to outside the fuel cartridge 1400 via a gas discharge port 1414.
    Type: Grant
    Filed: December 6, 2004
    Date of Patent: March 16, 2010
    Assignee: NEC Corporation
    Inventors: Yasutaka Kono, Yoshimi Kubo, Tsutomu Yoshitake, Takashi Manako, Hiroshi Kajitani, Hidekazu Kimura, Satoshi Nagao, Eiji Akiyama, Yoshinori Watanabe
  • Patent number: 7645536
    Abstract: A fuel cell (100) is mounted with a fuel cartridge (1220) in a detachable manner. The fuel cartridge (1220) is provided with a connecting part (1225) and the fuel cell (100) is provided with a fitting part (1205) into which the connecting part (1225) is fitted. The fuel cell (100) identifies the fitted fuel cartridge (1220).
    Type: Grant
    Filed: November 18, 2004
    Date of Patent: January 12, 2010
    Assignee: NEC Corporation
    Inventors: Eiji Akiyama, Yoshimi Kubo, Tsutomu Yoshitake, Takashi Manako, Hiroshi Kajitani, Hidekazu Kimura, Satoshi Nagao, Yoshinori Watanabe, Yasutaka Kono
  • Patent number: 7618733
    Abstract: A fuel cell has a fuel electrode and an oxidizing agent electrode, a fuel supply path that supplies a liquid fuel to the fuel electrode, an oxidizing agent supply path that supplies an oxidizing agent to the oxidizing agent electrode, and an opening/closing member that, by changing its shape, opens and closes the oxidizing agent supply path. The change in the shape of the opening/closing member regulates the opening and closing of the oxidizing agent supply path.
    Type: Grant
    Filed: March 31, 2005
    Date of Patent: November 17, 2009
    Assignee: NEC Corporation
    Inventors: Eiji Akiyama, Satoshi Tomoeda, Takashi Manako, Tsutomu Yoshitake, Yoshimi Kubo
  • Publication number: 20080058235
    Abstract: A lubricative composition for industrial machinery and equipment which comprises a base oil selected from among mineral oils, fats and oils, synthetic oils and mixture of two or more of them, and at least one additive selected from among the following components (A) to (D): component (A): (A-1) a phosphorus-containing carboxylic acid and/or (A-2) a thiophosphoric ester, component (B): a dispersant viscosity index improver, component (C): (C-1) a specific amidocarboxylic acid compound and/or (C-2) a specific carboxylic acid compound, and component (D): an ester oiliness improver. The composition is favorable as a lubricating oil composition and useful as a gear oil composition, a lubricating oil composition for paper machines or a lubricating oil composition for slide guides, a hydraulic oil, or the like.
    Type: Application
    Filed: March 25, 2005
    Publication date: March 6, 2008
    Inventors: Katsuya Takigawa, Yukiharu Beppu, Sinichi Mitsumoto, Masahiro Hata, Eiji Akiyama