Patents by Inventor Kazutaka Watanabe

Kazutaka Watanabe 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: 9401242
    Abstract: A composite electronic component includes a multilayer body, coils, an antistatic element and outer electrodes. The multilayer body is configured by laminating insulator layers. The coils are provided on the upper surfaces of the insulator layers. The antistatic element is connected to the coils and includes ground electrodes. The outer electrodes are connected to the coils. The upper surfaces of the insulator layers on which the coils are provided do not intersect with the ground electrodes.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: July 26, 2016
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Tomohiro Kido, Miho Kitamura, Kazutaka Watanabe
  • Patent number: 9199848
    Abstract: To provide a process capable of efficiently producing a spherical aluminum nitride powder having a size most suited for use as a filler, and having a high sphericalness and a large particle strength. A spherical aluminum nitride powder is produced by using a spherical granulated product of an alumina powder or an alumina hydrate powder as a starting material, and feeding the spherical granulated product to the step of reductive nitrogenation so as to be reductively nitrogenated.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: December 1, 2015
    Assignee: TOKUYAMA CORPORATION
    Inventors: Kazutaka Watanabe, Takehiko Yoneda
  • Patent number: 9090469
    Abstract: To provide a method of producing a spherical aluminum nitride powder which has a large thermal conductivity and excellent filling property, and is useful as a filler for heat-radiating materials. [Means for Solution] The spherical aluminum nitride powder is produced by reductively nitriding a mixture of 100 parts by mass of an alumina or an alumina hydrate, 0.5 to 30 parts by mass of a rare earth metal compound and 38 to 46 parts by mass of a carbon powder at a temperature of 1620 to 1900° C. for not less than 2 hours.
    Type: Grant
    Filed: September 27, 2011
    Date of Patent: July 28, 2015
    Assignee: TOKUYAMA CORPORATION
    Inventors: Takatoshi Muneoka, Kazutaka Watanabe
  • Patent number: 9073755
    Abstract: [Problems] To provide a spherical aluminum nitride powder that features high thermal conductivity and filling property, and that is useful as a filler for a heat radiating material, and a method of producing the same. [Means for Solution] A spherical aluminum nitride powder comprising aluminum nitride particles having an average particle diameter of 3 to 30 ?m, a sphericalness of not less than 0.75, and an oxygen content of not more than 1% by weight wherein, when the average particle diameter is d (?m), the specific surface area S (m2/g) satisfies the following formula (1), (1.84/d)?S?(1.84/d+0.5)??(1).
    Type: Grant
    Filed: August 31, 2011
    Date of Patent: July 7, 2015
    Assignee: TOKUYAMA CORPORATION
    Inventors: Takatoshi Muneoka, Kazutaka Watanabe
  • Patent number: 9056774
    Abstract: [Problem] To provide a method of producing aluminum nitride that has high conducting property and can be excellently filled and is useful as a filler for heat-radiating materials, and an aluminum nitride powder obtained by the same method.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: June 16, 2015
    Assignee: TOKUYAMA CORPORATION
    Inventors: Takatoshi Muneoka, Kazutaka Watanabe
  • Publication number: 20150097648
    Abstract: A composite electronic component includes a multilayer body, coils, an antistatic element and outer electrodes. The multilayer body is configured by laminating insulator layers. The coils are provided on the upper surfaces of the insulator layers. The antistatic element is connected to the coils and includes ground electrodes. The outer electrodes are connected to the coils. The upper surfaces of the insulator layers on which the coils are provided do not intersect with the ground electrodes.
    Type: Application
    Filed: September 19, 2014
    Publication date: April 9, 2015
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventors: Tomohiro KIDO, Miho KITAMURA, Kazutaka WATANABE
  • Publication number: 20130244036
    Abstract: [Problem] To provide a method of producing aluminum nitride that has high conducting property and can be excellently filled and is useful as a filler for heat-radiating materials, and an aluminum nitride powder obtained by the same method. [Means for Solution] An aluminum nitride powder is produced by reducing and nitriding: an alumina powder or a hydrated alumina powder having a primary grain size of 0.001 to 6 ?m; and a powder of a compound containing a rare earth metal element and having an average grain size in a range of 2 ?m to 80 ?m, the average grain size being not less than 6 times as great as the primary grain size of the alumina powder or the hydrated alumina powder; in the presence of a carbon powder at a temperature of 1620° C. to 1900° C. for not less than 2 hours.
    Type: Application
    Filed: November 30, 2011
    Publication date: September 19, 2013
    Applicant: TOKUYAMA CORPORATION
    Inventors: Takatoshi Muneoka, Kazutaka Watanabe
  • Publication number: 20130171451
    Abstract: To provide a method of producing a spherical aluminum nitride powder which has a large thermal conductivity and excellent filling property, and is useful as a filler for heat-radiating materials. [Means for Solution] The spherical aluminum nitride powder is produced by reductively nitriding a mixture of 100 parts by mass of an alumina or an alumina hydrate, 0.5 to 30 parts by mass of a rare earth metal compound and 38 to 46 parts by mass of a carbon powder at a temperature of 1620 to 1900° C. for not less than 2 hours.
    Type: Application
    Filed: September 27, 2011
    Publication date: July 4, 2013
    Applicant: TOKUYAMA CORPORATION
    Inventors: Takatoshi Muneoka, Kazutaka Watanabe
  • Publication number: 20130164534
    Abstract: [Problems] To provide a spherical aluminum nitride powder that features high thermal conductivity and filling property, and that is useful as a filler for a heat radiating material, and a method of producing the same. [Means for Solution] A spherical aluminum nitride powder comprising aluminum nitride particles having an average particle diameter of 3 to 30 ?m, a sphericalness of not less than 0.75, and an oxygen content of not more than 1% by weight wherein, when the average particle diameter is d (?m), the specific surface area S (m2/g) satisfies the following formula (1), (1.84/d)?S?(1.84/d+0.
    Type: Application
    Filed: August 31, 2011
    Publication date: June 27, 2013
    Applicant: TOKUYAMA CORPORATION
    Inventors: Takatoshi Muneoka, Kazutaka Watanabe
  • Publication number: 20120258310
    Abstract: [Problems] To provide a process capable of efficiently producing a spherical aluminum nitride powder having a size most suited for use as a filler, and having a high sphericalness and a large particle strength. [Means for Solution] A spherical aluminum nitride powder is produced by using a spherical granulated product of an alumina powder or an alumina hydrate powder as a starting material, and feeding the spherical granulated product to the step of reductive nitrogenation so as to be reductively nitrogenated.
    Type: Application
    Filed: January 31, 2011
    Publication date: October 11, 2012
    Inventors: Kazutaka Watanabe, Takehiko Yoneda
  • Patent number: 7625971
    Abstract: Disclosed are silica-filled rubber granules comprised of a cocoagulation product of rubber and silica, which are extremely less powdery and excellent in handling and kneading, as well as an industrially advantageous process for producing same. The silica-filled rubber granules of the present invention are dried granules of a cocoagulation product of rubber and silica particles, which are characterized in that an average particle diameter (D50) in terms of the sieve analysis is 300˜3000 ?m and the weight ratio of the granules within the range of D50±(D50×0.5) is at least 50% by weight. The silica-filled rubber granules are produced by supplying a cake of a cocoagulation product of silica and rubber having a water content of 40˜80% by weight to a drier provided with an indirect-heating type container having stirring wing blades, and then drying the cake while stirring it with the stirring wing blade.
    Type: Grant
    Filed: August 19, 2004
    Date of Patent: December 1, 2009
    Assignees: Tokuyama Corporation, Zeon Corporation
    Inventors: Shinji Tokunaga, Tsunetoshi Sugimura, Kazutaka Watanabe, Osamu Yatabe, Takeshi Karato, Takahiko Fukahori, Yoshihiro Chino
  • Publication number: 20070260005
    Abstract: A silica-containing conjugated diene rubber composition comprising a conjugated diene rubber-silica mixture (A) containing at least 30 wt % of toluene insoluble components obtainable by co-coagulating an aqueous dispersion or solution of conjugated diene rubber (a) having a glass transition temperature of ?120 to 0° C. with an aqueous dispersion of silica, blended with a conjugated diene rubber (b) having a glass transition temperature such that the difference in absolute value between the glass transition temperature of rubber (b) and that of rubber (a) is 3 to 100° C. According to the invention, it is possible to provide a rubber composition having highly balanced fuel efficiency, wet grip performance, mechanical strength, wear resistance and low temperature brittleness resistance; and suitably used for tire treads.
    Type: Application
    Filed: October 29, 2004
    Publication date: November 8, 2007
    Applicants: ZEON CORPORATION, Tokuyama Corporation
    Inventors: Takeshi Karato, Yoshihiro Chino, Kazutaka Watanabe, Osamu Yatabe
  • Publication number: 20070037916
    Abstract: The present invention is to provide a diene rubber composition and a cross-linked diene rubber thereof excellent in tensile strength, wear resistance and processability, keeping compatibility of both good fuel efficiency and high gripping property, and a production method thereof. What is characterized in the composition is that the composition is comprised of 100 parts by weight of a diene rubber having a molecular weight distribution expressed in terms of the ratio of the weight-average molecular weight to the number-average molecular weight of 1.1 to 30, 20 to 200 parts by weight of silica and a cationic polymer, and that a toluene-insoluble rubber content per gram of the silica within the range from 0.2 to 1 g, and diene cross-linked rubber thereof.
    Type: Application
    Filed: January 30, 2004
    Publication date: February 15, 2007
    Inventors: Kazutaka Watanabe, Osamu Yatabe, Takeshi Karato, Yoshihiro Chino, Takahiko Fukahori
  • Publication number: 20060281850
    Abstract: Disclosed are silica-filled rubber granules comprised of a cocoagulation product of rubber and silica, which are extremely less powdery and excellent in handling and kneading, as well as an industrially advantageous process for producing same. The silica-filled rubber granules of the present invention are dried granules of a cocoagulation product of rubber and silica particles, which are characterized in that an average particle diameter (D50) in terms of the sieve analysis is 300˜3000 ?m and the weight ratio of the granules within the range of D50±(D50×0.5) is at least 50% by weight. The silica-filled rubber granules are produced by supplying a cake of a cocoagulation product of silica and rubber having a water content of 40˜80% by weight to a drier provided with an indirect-heating type container having stirring wing blades, and then drying the cake while stirring it with the stirring wing blade.
    Type: Application
    Filed: August 19, 2004
    Publication date: December 14, 2006
    Applicants: Tokuyama Corporation, Zeon Corporation
    Inventors: Shinji Tokunaga, Tsunetoshi Sugimura, Kazutaka Watanabe, Osamu Yatabe, Takeshi Karato, Takahiko Fukahori, Yoshihiro Chino
  • Publication number: 20060143938
    Abstract: A silica-containing rubber composition produced by filtering slurry of silica-containing rubber crumbs obtained by co-coagulating a mixture of rubber latex and silica to give a moisture content of 80 wt % or less, dehydrating by a dehydrator having a compression function, then, drying. According to the present invention, a silica-containing rubber composition with improved silica dispersibility can be provided.
    Type: Application
    Filed: June 29, 2004
    Publication date: July 6, 2006
    Inventors: Takeshi Karato, Kazuhiro Hikida, Takahiko Fukahori, Yoshihiro Chino, Kazutaka Watanabe, Osamu Yatabe, Tsunetoshi Sugimura, Shinji Tokunaga
  • Patent number: 6231317
    Abstract: To resolve a problem of decreasing a heat exchange rate of a refrigerating cycle owing to a large amount of a refrigerator oil delivered from a discharge pipe to the refrigerating cycle, there is provided a sealed compressor driven by a motor having a compressor unit and a motor unit in which a ring is provided at an outer periphery of a coil end of a stator on a side of the compressor unit to reduce the amount of delivering the refrigerator oil to the refrigerating cycle and a shape of a balance weight of a rotor on the side of the compressor unit is formed in a cylindrical shape a portion of a side face of which is opened and an end face of which is flat to thereby reduce stirring of fluid.
    Type: Grant
    Filed: September 3, 1999
    Date of Patent: May 15, 2001
    Assignee: Hitachi, Ltd.
    Inventors: Kazutaka Watanabe, Yoshihiro Sasaki, Koichi Sekiguchi
  • Patent number: 6134205
    Abstract: To provide an optical disk device wherein information reading/writing of a desired content of a recording medium can be started immediately when its disk tray is re-loaded without removal of the recording medium, the optical disk device comprises a disk tray (2) whereon an optical disk to be loaded is set, a disk detection switch (3) for discriminating whether an optical disk is set or not on the disk tray, a main controller (4) having a function for controlling the optical disk device to read medium information only when a removal of an optical disk loaded on the optical disk device is checked to have been performed just before loading of the optical disk, referring to a logical sequence of a detection signal output from the disk detection switch (3).
    Type: Grant
    Filed: October 29, 1998
    Date of Patent: October 17, 2000
    Assignee: NEC Corporation
    Inventor: Kazutaka Watanabe
  • Patent number: 4404643
    Abstract: A portable electronic calculator which has incorporated therein a writing instrument. A miniature electronic calculator is built in a rectangular, elongated body. A cover made of metal covers a control panel for the electronic calculator and a display part, and the cover is mounted on the body to be removable therefrom by sliding the cover in the lengthwise direction of the body. The side marginal portions of the cover are bent inwardly for engagement with both side surfaces of the body to reinforce the body when the cover has been mounted thereon.
    Type: Grant
    Filed: February 12, 1981
    Date of Patent: September 13, 1983
    Assignee: Hosiden Electronics Co.
    Inventors: Shin Ojima, Kazutaka Watanabe, Hiroshi Iwasaki
  • Patent number: 4128889
    Abstract: A pen type electronic digital calculator in which keys are arranged in three rows on one half part of the tubular body in its lengthwise direction and when the three rows of keys are held substantially horizontal, the top surface of each key of the central row is higher than the top surfaces of the keys of the other rows. The keys of the respective rows are mounted so that they are longitudinally spaced from the keys of adjacent rows, and each key is disposed at the center of a recess formed in the tubular body.
    Type: Grant
    Filed: June 24, 1977
    Date of Patent: December 5, 1978
    Assignee: Hoshidenki-Seizo Kabushiki Kaisha
    Inventors: Shin Ojima, Kazuhiko Ohgami, Kazutaka Watanabe, Masaru Nohara, Kenji Yamamoto
  • Patent number: 4046959
    Abstract: A data communication system comprising a master station and n number of substations, each substation comprising a receiving photocoupler and a transmission photocoupler, and wherein a particular substation may be connected into a transmission line leading to the master station by connecting the receiving photocoupler in series in parallel circuit to the transmission line and wherein data transmission from the master station to the substation is accomplished by means of a current supplied forward with respect to the receiving photocoupler of the substation, and data transmission from the substation to the master station is done by means of a current supplied reverse with respect to the transmission photocoupler of the substation.
    Type: Grant
    Filed: June 7, 1976
    Date of Patent: September 6, 1977
    Assignee: Kabushikikaisha Yokogawa Denki Seisakusho
    Inventors: Kazutaka Watanabe, Misao Shimizu, Akihiro Sugawara