Patents by Inventor Akira Fujishima

Akira Fujishima 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: 7157840
    Abstract: An illuminating device is made from a transparent hollow envelope that encloses a filler gas. The envelope has inner and outer surfaces. The illuminating device has a coating of a fluorescent material deposited on the inner surface of the transparent envelope where the fluorescent material emits light having a visible component and an ultraviolet component; and a titanium dioxide film having first and second opposing surfaces where the first surface of the titanium dioxide film is formed on the outer surface of the transparent envelope. A light transmittance of the titanium dioxide film is at least 50% for light having a wavelength of 550 nm, and the light transmitted from the fluorescent material through the transparent envelope and the first surface of the titanium dioxide film to the second surface thereof causes photocatalytic activity to be generated on the second surface of the titanium dioxide film.
    Type: Grant
    Filed: December 24, 2002
    Date of Patent: January 2, 2007
    Assignees: Kanagawa Academy of Science and Technology, Nippon Soda Co., Ltd.
    Inventors: Akira Fujishima, Kazuhito Hashimoto, Tomokazu Iyoda, Shigemichi Fukayama, Tetsuo Yoshimoto, Tokuyoshi Saitoh
  • Publication number: 20060234024
    Abstract: The present invention provides a new photocatalyst sheet in which the substrates coated with fluorocarbon resin are readily weldable mutually, and also of the high antifouling and water-repellant property by coating the outermost surface of film/fabric structure with fluorocarbon resin containing a photocatalyst and a photocatalyst sheet comprises a substrate (2), a first fluorocarbon resin layer (3) coated on said substrate (2), a second fluorocarbon resin layer (4) coated on said first fluorocarbon resin layer (3), and a third fluorocarbon resin layer (5) containing photocatalyst coated on said second fluorocarbon resin layer (4). The melting point of the first fluorocarbon resin layer (3) may be higher than the melting points of the second and the third fluorocarbon resin layers (4), (5).
    Type: Application
    Filed: July 2, 2004
    Publication date: October 19, 2006
    Applicant: Taiyo Kogyo Corporation
    Inventors: Kazuhiro Abe, Hiroshi Toyoda, Takayuki Nakata, Eiichi Okamoto, Akira Fujishima, Kazuhito Hashimoto
  • Patent number: 7098967
    Abstract: Frequency conversion into a first intermediate frequency which is higher than a received frequency band is performed for a received signal by using a mixer and a PLL. Next, an output of the mixer is frequency converted into a second intermediate frequency of a base band by using a quadrature mixer formed by mixers and a phase shifter. At this time, a frequency of the local oscillation signal of a PLL supplied to the quadrature mixer is controlled so as to be switched, depending on a position of the received segment, between a frequency which is higher than the first intermediate frequency and a frequency which is lower than the same.
    Type: Grant
    Filed: September 20, 2002
    Date of Patent: August 29, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Ippei Kanno, Hiroaki Ozeki, Yasuo Oba, Akira Fujishima, Mineyuki Iwaida
  • Patent number: 7013124
    Abstract: When changeover switch (26) selects the output of L band filter (23), changeover switch (28) is turned off and mixer (29) is operated as an amplifier such that the oscillation frequency of local oscillator (31) is controlled based on data fed to data terminal (37) and a channel selection can be performed in mixer (32). When changeover switch (26) selects the output of V band filter (25), changeover switch (28) is turned on and a channel selection is performed based on data fed to data terminal (37) in mixer (29). With this arrangement, the need for a tuning filter is eliminated and a broadband tuner not requiring manpower for adjustments can be provided.
    Type: Grant
    Filed: April 5, 2002
    Date of Patent: March 14, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Masashi Yasuda, Akira Fujishima
  • Publication number: 20050249160
    Abstract: In a mobile communication system, which has a plurality of radio network controllers and a number of radio base stations connected to each of the radio network controllers, for sending and receiving user data between a host network and mobile stations via the radio network controllers and radio base stations, a plurality of transmission paths that pass through one or more radio network controllers are set up between a base station, which sends and receives radio signals to and from a mobile station, and the host network. When data is being sent and received using one transmission path from the host network to a base station through a radio network controller, traffic conditions on this transmission path are monitored. When traffic has increased, the user data is dispersed by being passed through a plurality of transmission paths.
    Type: Application
    Filed: June 2, 2005
    Publication date: November 10, 2005
    Inventors: Tetsuo Tomita, Toshiyuki Yokosaka, Akira Fujishima
  • Publication number: 20050228026
    Abstract: A novel crystal of (R)-2-[[[3-methyl-4-(2,2,2-trifluoroethoxy)-2-pyridinyl]methyl]sulfinyl]-1H-benzimidazole or a salt thereof of the present invention is useful for an excellent antiulcer agent.
    Type: Application
    Filed: June 10, 2005
    Publication date: October 13, 2005
    Inventors: Akira Fujishima, Isao Aoki, Keiji Kamiyama
  • Patent number: 6939611
    Abstract: A titanium dioxide film (2) having at least photocatalytic activity, whose light linear transmittance corresponding to light having a wavelength of 550 nm is not less than 50% and whose thickness is 0.1 to 5 ?m or so, is formed on a transparent substrate (1) constituted by a glass plate or the like. Preferably, a precoat film (3), which has optical transmissivity and is constituted by a SiO2 film having a thickness of 0.02 to 0.2 ?m or so, is provided between the transparent substrate (1) and the titanium dioxide film (2). Thereby, excellent photocatalytic action and optical transmissivity can be obtained. Moreover, members composing various structures such as a glass window, which are especially required to have optical transparency, can be further provided with photocatalytic activities.
    Type: Grant
    Filed: March 22, 2002
    Date of Patent: September 6, 2005
    Assignees: Kanagawa Academy of Science and Technology, Nippon Soda Co., Ltd.
    Inventors: Akira Fujishima, Kazuhito Hashimoto, Tomokazu Iyoda, Shigemichi Fukayama, Tetsuo Yoshimoto, Tokuyoshi Saitoh
  • Patent number: 6939971
    Abstract: A novel crystal of (R)-2-[[[3-methyl-4-(2,2,2-trifluoroethoxy)-2-pyridinyl]methyl]sulfinyl]-1H-benzimidazole or a salt thereof of the present invention is useful for an excellent antiulcer agent.
    Type: Grant
    Filed: September 4, 2003
    Date of Patent: September 6, 2005
    Assignee: Takeda Pharmaceutical Company, Ltd.
    Inventors: Akira Fujishima, Isao Aoki, Keiji Kamiyama
  • Publication number: 20050171162
    Abstract: Crystals of (S)-2[[[3-methyl-4-(2,2,2-trifluoroethoxy)-2-pyridinyl]methyl]sulfinyl]-1H-benzimidazole or salts thereof, useful as excellent antiulcer drugs.
    Type: Application
    Filed: April 1, 2005
    Publication date: August 4, 2005
    Inventors: Akira Fujishima, Isao Aoki, Keiji Kamiyama
  • Patent number: 6903122
    Abstract: Crystals of (S)-2[[[3-methyl-4-(2,2,2-trifluoroethoxy)-2-pyridinyl]methyl]sulfinyl]-1H-benzimidazole or salts thereof, useful as excellent antiulcer drugs.
    Type: Grant
    Filed: June 23, 2003
    Date of Patent: June 7, 2005
    Assignee: Takeda Pharmaceutical Company Limited
    Inventors: Akira Fujishima, Isao Aoki, Keiji Kamiyama
  • Publication number: 20050105499
    Abstract: A communication device is disclosed that includes a priority provision part. The priority provision part provides priority information to a predetermined control packet to be transmitted from a first layer controlling a data packet retransmission function, and provides the predetermined control packet to a second layer lower than a first layer. The priority information indicates that the predetermined control packet is to be transmitted from the second layer prior to another packet.
    Type: Application
    Filed: May 25, 2004
    Publication date: May 19, 2005
    Inventors: Atsushi Shinozaki, Toshiyuki Yokosaka, Akira Fujishima
  • Patent number: 6882459
    Abstract: The inventive photoreactive device has a semiconductor and an oxidation-reduction material. The semiconductor has a conduction band with a potential and being capable of producing electrons under the irradiation of light on the semiconductor. The oxidation-reduction material has a redox potential being positive compared with the potential of the conduction band. The semiconductor supplies electrons into the oxidation-reduction material to reduce it under the irradiation of light for storing the electrons. The stored electrons are discharged from the oxidation-reduction material into a metal material to prevent the corrosion of the metal material.
    Type: Grant
    Filed: August 28, 2001
    Date of Patent: April 19, 2005
    Assignees: Koyo Engineering
    Inventors: Akira Fujishima, Tetsu Tatsuma, Yoshihisa Ohko, Shuichi Saitoh, Katsuhisa Kashiwazaki
  • Publication number: 20050019700
    Abstract: A method of preventing or reducing fogging of a surface of a composite when subjected to humid conditions includes providing a composite with a surface. The composite includes a substrate and a photocatalytic surface layer. The photocatalytic surface layer includes a photocatalyst. The method further includes subjecting the photocatalyst to photoexcitation to render the surface of the composite hydrophilic, wherein, after the photoexcitation, the surface of the composite has a water wettability of less than 10° in terms of the contact angle with water. The method further includes subjecting the composite to humidity that is sufficient to induce fogging of the substrate if the photocatalytic surface layer were absent.
    Type: Application
    Filed: August 23, 2004
    Publication date: January 27, 2005
    Inventors: Makoto Hayakawa, Eiichi Kojima, Keiichiro Norimoto, Mitsuyoshi Machida, Atsushi Kitamura, Toshiya Watanabe, Makoto Chikuni, Akira Fujishima, Kazuhito Hashimoto
  • Patent number: 6830785
    Abstract: The surface of a substrate is coated with an abrasion-resistant photocatalytic coating comprised of a semiconductor photocatalyst. upon irradiation by a light having a wavelength of an energy higher than the bandgap energy of the photocatalyst, water is chemisorbed onto the surface in the form of hydroxyl groups (OH−) whereby the surface of the photocatalytic coating is rendered highly hydrophilic. In certain embodiments, the surface of a mirror, lens, or windowpane is coated with the photocatalytic coating to exhibit a high degree of antifogging function. In another embodiment, an article or product coated with the photocatalytic coating is disposed outdoors and the highly hydrophilic surface thereof is self-cleaned as it is subjected to rainfall. In a still another embodiment, an article is coated with the photocatalytic coating and, when the article is soaked in, rinsed by or wetted with water, fatty dirt and contaminants are readily released without resort to a detergent.
    Type: Grant
    Filed: August 13, 1999
    Date of Patent: December 14, 2004
    Assignee: Toto Ltd.
    Inventors: Makoto Hayakawa, Eiichi Kojima, Keiichiro Norimoto, Mitsuyoshi Machida, Atsushi Kitamura, Toshiya Watanabe, Makoto Chikuni, Akira Fujishima, Kazuhito Hashimoto
  • Patent number: 6737145
    Abstract: The present invention is concerned with an organic-inorganic composite graded material containing a composite material formed by chemically bonding an organic polymer compound and a metallic compound and having a component graded structure in which the content of the metallic compound continuously changes in the depth direction from the material surface, a process for the production of the above organic-inorganic composite graded material by forming a coating layer composed of a specific coating solution for forming the organic-inorganic composite film on an organic substrate and drying the coating layer under heat, a coating agent composed of the above organic-inorganic composite graded material for forming a coating film, and an article coated with the above coating agent.
    Type: Grant
    Filed: June 8, 2001
    Date of Patent: May 18, 2004
    Assignees: Ube Nitto Kasei Co., Ltd.
    Inventors: Toshiya Watanabe, Kazuhito Hashimoto, Akira Fujishima, Kazuyuki Takami, Norihiro Nakayama, Taro Suzuki, Naoki Tanaka, Eisuke Tachibana, Tatsuhiko Adachi
  • Publication number: 20040082791
    Abstract: Crystals of (S)-2[[[3-methyl-4-(2,2,2-trifluoroethoxy)-2-pyridinyl]methyl]sulfinyl]-1H-benzimidazole or salts thereof, useful as excellent antiulcer drugs.
    Type: Application
    Filed: June 23, 2003
    Publication date: April 29, 2004
    Inventors: Akira Fujishima, Isao Aoki, Keiji Kamiyama
  • Publication number: 20040067744
    Abstract: A high-frequency signal receiver includes a mixer having one port for receiving an input signal and another port for receiving an output from a local oscillator, a filter for receiving an output from the mixer, and an output terminal to which an output from the filter is supplied. At least the mixer and the filter are formed of balanced circuits, so that they have high capability of eliminating interference. Distances between the circuits thus can be short. Further, partition plates for shielding the interference are not needed, thus allowing the receiver to be small.
    Type: Application
    Filed: August 25, 2003
    Publication date: April 8, 2004
    Inventors: Toshihiro Furusawa, Akira Fujishima, Hirotoshi Takeuchi
  • Publication number: 20040048898
    Abstract: A novel crystal of (R)-2-[[[3-methyl-4-(2,2,2-trifluoroethoxy)-2-pyridinyl]methyl]sulfinyl]-1H-benzimidazole or a salt thereof of the present invention is useful for an excellent antiulcer agent.
    Type: Application
    Filed: September 4, 2003
    Publication date: March 11, 2004
    Inventors: Akira Fujishima, Isao Aoki, Keiji Kamiyama
  • Publication number: 20040017866
    Abstract: A high-frequency signal receiver includes a variable gain amplifier for amplifying a high frequency signal input thereto, a local oscillator, a mixer for mixing a signal output from the variable gain amplifier and a signal output from the local oscillator, a filter for receiving a signal output from the mixer, a gain controller for outputting a voltage according to the signal output from the mixer; and a weighting circuit for weighting and summing a control voltage and the signal output from the gain controller for controlling the gain of the variable gain amplifier. The high-frequency signal receiver hence creates a small amount of signal error even when the input signal includes a large interference signal adjacent to a desired signal.
    Type: Application
    Filed: April 15, 2003
    Publication date: January 29, 2004
    Inventors: Akira Fujishima, Kenji Adachi, Hirotoshi Takeuchi, Yasuo Oba, Ippei Kanno, Hiroaki Ozeki
  • Patent number: 6664276
    Abstract: A novel crystal of (R)-2-[[[3-methyl-4-(2,2,2-trifluoroethoxy)-2-pyridinyl]methyl]sulfinyl]-1H-benzimidazole or a salt thereof of the present invention is useful for an excellent antiulcer agent.
    Type: Grant
    Filed: September 13, 2002
    Date of Patent: December 16, 2003
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Akira Fujishima, Isao Aoki, Keiji Kamiyama