Patents by Inventor Eiichi Nakai

Eiichi Nakai 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: 11862943
    Abstract: Spark plug has center electrode having leg portion extending in an axis direction, brim portion located at rear end side with respect to the leg portion and protruding outwards in a radial direction with respect to the leg portion and connecting portion connecting the leg portion and the brim portion; insulator having penetration hole and supporting the center electrode; and seal member filling the penetration hole and fixing the brim portion and the insulator. The center electrode satisfies “(D1-D2)/D1?0.06”, where a maximum value of a radius of the brim portion is D1, and a minimum value of the radius of the brim portion is D2, also satisfies “L2/L1?0.30”, where a size of the center electrode along the axis direction is L1, and a size along the axis direction from boundary between the connecting portion and the leg portion to a center of gravity of the center electrode is L2.
    Type: Grant
    Filed: September 10, 2020
    Date of Patent: January 2, 2024
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Eiichi Nakai, Masahiro Nishida, Shingo Kozuka
  • Publication number: 20230155353
    Abstract: Spark plug has center electrode having leg portion extending in an axis direction, brim portion located at rear end side with respect to the leg portion and protruding outwards in a radial direction with respect to the leg portion and connecting portion connecting the leg portion and the brim portion; insulator having penetration hole and supporting the center electrode; and seal member filling the penetration hole and fixing the brim portion and the insulator. The center electrode satisfies “(D1-D2)/D1 ? 0.06”, where a maximum value of a radius of the brim portion is D1, and a minimum value of the radius of the brim portion is D2, also satisfies “L2/L1 ? 0.30”, where a size of the center electrode along the axis direction is L1, and a size along the axis direction from boundary between the connecting portion and the leg portion to a center of gravity of the center electrode is L2.
    Type: Application
    Filed: September 10, 2020
    Publication date: May 18, 2023
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Eiichi NAKAI, Masahiro NISHIDA, Shingo KOZUKA
  • Patent number: 11304658
    Abstract: The method for diagnosing cerebrospinal fluid hypovolemia includes injecting saline into a subdural space of a subject in a decubitus position, raising an upper body of the subject, and then determining whether the subject has headache or not, or headache of the subject is relieved or not.
    Type: Grant
    Filed: August 9, 2019
    Date of Patent: April 19, 2022
    Assignee: National University Corporation Kochi University
    Inventors: Eiichi Nakai, Tetsuya Ueba
  • Publication number: 20210038152
    Abstract: The method for diagnosing cerebrospinal fluid hypovolemia includes injecting saline into a subdural space of a subject in a decubitus position, raising an upper body of the subject, and then determining whether the subject has headache or not, or headache of the subject is relieved or not.
    Type: Application
    Filed: August 9, 2019
    Publication date: February 11, 2021
    Applicant: NATIONAL UNIVERSITY CORPORATION KOCHI UNIVERSITY
    Inventors: Eiichi NAKAI, Tetsuya UEBA
  • Patent number: 9907864
    Abstract: The objective of the present invention to provide a method for accurately and safely specifying a leakage part of cerebrospinal fluid in a cerebrospinal fluid hypovolemia patient, and a method for effectively treating cerebrospinal fluid hypovolemia with utilizing the specifying method. The method for specifying a leakage part of cerebrospinal fluid in a cerebrospinal fluid hypovolemia patient according to the present invention is characterized in comprising the steps of injecting saline into a bone-marrow space of a spine of the cerebrospinal fluid hypovolemia patient, and detecting the cerebrospinal fluid or the injected saline leaked from a dura mater of the spine to specify the leakage part of the cerebrospinal fluid.
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: March 6, 2018
    Assignee: NATIONAL UNIVERSITY CORPORATION KOCHI UNIVERSITY
    Inventor: Eiichi Nakai
  • Publication number: 20180050119
    Abstract: The objective of the present invention to provide a method for accurately and safely specifying a leakage part of cerebrospinal fluid in a cerebrospinal fluid hypovolemia patient, and a method for effectively treating cerebrospinal fluid hypovolemia with utilizing the specifying method. The method for specifying a leakage part of cerebrospinal fluid in a cerebrospinal fluid hypovolemia patient according to the present invention is characterized in comprising the steps of injecting saline into a bone-marrow space of a spine of the cerebrospinal fluid hypovolemia patient, and detecting the cerebrospinal fluid or the injected saline leaked from a dura mater of the spine to specify the leakage part of the cerebrospinal fluid.
    Type: Application
    Filed: August 19, 2016
    Publication date: February 22, 2018
    Applicant: NATIONAL UNIVERSITY CORPORATION KOCHI UNIVERSITY
    Inventor: Eiichi NAKAI
  • Publication number: 20110294749
    Abstract: A compound which may be used for the prevention or treatment of respiratory diseases in which STAT 6 is concerned, particularly asthma, chronic obstructive pulmonary disease and the like is provided. A pyrimidine derivative or a salt thereof, which has an arylamino or arylethylamino group which may be substituted with a specified substituent, at the 2-position, amino group substituted with benzyl group or the like, at the 4-position, and carbamoyl group which may be substituted, at the 5-position, is provided.
    Type: Application
    Filed: June 28, 2011
    Publication date: December 1, 2011
    Applicant: Astellas Pharma Inc.
    Inventors: Shinya Nagashima, Hiroshi Nagata, Masahiro Iwata, Masaki Yokota, Hiroyuki Moritomo, Eiichi Nakai, Sadao Kuromitsu, Keiko Ohga, Makoto Takeuchi
  • Patent number: 8012959
    Abstract: A compound which may be used for the prevention or treatment of respiratory diseases in which STAT 6 is concerned, particularly asthma, chronic obstructive pulmonary disease and the like is provided. A pyrimidine derivative or a salt thereof, which has an arylamino or arylethylamino group which may be substituted with a specified substituent, at the 2-position, amino group substituted with benzyl group or the like, at the 4-position, and carbamoyl group which may be substituted, at the 5-position, is provided.
    Type: Grant
    Filed: September 22, 2008
    Date of Patent: September 6, 2011
    Assignee: Astellas Pharma Inc.
    Inventors: Shinya Nagashima, Hiroshi Nagata, Masashiro Iwata, Masaki Yokota, Hiroyuki Moritomo, Eiichi Nakai, Sadao Kuromitsu, Keiko Ohga, Makoto Takeuchi
  • Publication number: 20090281072
    Abstract: A compound which may be used for the prevention or treatment of respiratory diseases in which STAT 6 is concerned, particularly asthma, chronic obstructive pulmonary disease and the like is provided. A pyrimidine derivative or a salt thereof, which has an arylamino or arylethylamino group which may be substituted with a specified substituent, at the 2-position, amino group substituted with benzyl group or the like, at the 4-position, and carbamoyl group which may be substituted, at the 5-position, is provided.
    Type: Application
    Filed: September 22, 2008
    Publication date: November 12, 2009
    Applicant: Astellas Pharm Inc.
    Inventors: Shinya Nagashima, Hiroshi Nagata, Masashiro Iwata, Masaki Yokota, Hiroyuki Moritomo, Eiichi Nakai, Sadao Kuromitsu, Keiko Ohga, Makoto Takeuchi
  • Patent number: 7449456
    Abstract: A compound which may be used for the prevention or treatment of respiratory diseases in which STAT 6 is concerned, particularly asthma, chronic obstructive pulmonary disease and the like is provided. A pyrimidine derivative or a salt thereof, which has an arylamino or arylethylamino group which may be substituted with a specified substituent, at the 2-position, amino group substituted with benzyl group or the like, at the 4-position, and carbamoyl group which may be substituted, at the 5-position, is provided.
    Type: Grant
    Filed: June 26, 2003
    Date of Patent: November 11, 2008
    Assignee: Astellas Pharma, Inc.
    Inventors: Shinya Nagashima, Hiroshi Nagata, Masahiro Iwata, Masaki Yokota, Hiroyuki Moritomo, Eiichi Nakai, Sadao Kuromitsu, Keiko Ohga, Makoto Takeuchi
  • Publication number: 20080227785
    Abstract: This invention relates to an anti-dementia agent which uses a BEC 1 potassium channel inhibitor as the active ingredient. It was proved that the BEC 1 potassium channel inhibitor has an action to improve learning disorder and is useful as a preventive or therapeutic agent for diseases, preferably dementia, in which the BEC 1 potassium channel is considered to be concerned. Illustratively, it was confirmed by an in vivo test that the BEC 1 potassium channel inhibitor has an action to improve learning disorder. Also, it was found that a compound having 2,4,6-triamino-1,3,5-triazine has a BEC 1 potassium channel inhibitory action.
    Type: Application
    Filed: February 6, 2008
    Publication date: September 18, 2008
    Applicant: Astellas Pharma Inc.
    Inventors: Hideki Kubota, Takeshi Suzuki, Masanori Miura, Eiichi Nakai, Kiyoshi Yahiro, Akira Miyake, Shinobu Mochizuki, Kazuhiro Nakatou
  • Patent number: 7375222
    Abstract: This invention relates to an anti-dementia agent which uses a BEC 1 potassium channel inhibitor as the active ingredient. It was proved that the BEC 1 potassium channel inhibitor has an action to improve learning disorder and is useful as a preventive or therapeutic agent for diseases, preferably dementia, in which the BEC 1 potassium channel is considered to be concerned. Illustratively, it was confirmed by an in vivo test that the BEC 1 potassium channel inhibitor has an action to improve learning disorder. Also, it was found that a compound having 2,4,6-triamino-1,3,5-triazine has a BEC 1 potassium channel inhibitory action.
    Type: Grant
    Filed: February 3, 2003
    Date of Patent: May 20, 2008
    Assignee: Astellas Pharma Inc.
    Inventors: Hideki Kubota, Takeshi Suzuki, Masanori Miura, Eiichi Nakai, Kiyoshi Yahiro, Akira Miyake, Shinobu Mochizuki, Kazuhiro Nakatou
  • Publication number: 20060194803
    Abstract: This invention relates to an anti-dementia agent which uses a BEC 1 potassium channel inhibitor as the active ingredient. It was proved that the BEC 1 potassium channel inhibitor has an action to improve learning disorder and is useful as a preventive or therapeutic agent for diseases, preferably dementia, in which the BEC 1 potassium channel is considered to be concerned. Illustratively, it was confirmed by an in vivo test that the BEC 1 potassium channel inhibitor has an action to improve learning disorder. Also, it was found that a compound having 2,4,6-triamino-1,3,5-triazine has a BEC 1 potassium channel inhibitory action.
    Type: Application
    Filed: February 3, 2003
    Publication date: August 31, 2006
    Inventors: Hideki Kubota, Takeshi Suzuki, Masanori Miura, Eiichi Nakai, Kiyoshi Yahiro, Akira Miyake, Shinobu Nakatou, Kazuhiro Nakatou
  • Publication number: 20050272753
    Abstract: A compound which may be used for the prevention or treatment of respiratory diseases in which STAT 6 is concerned, particularly asthma, chronic obstructive pulmonary disease and the like is provided. A pyrimidine derivative or a salt thereof, which has an arylamino or arylethylamino group which may be substituted with a specified substituent, at the 2-position, amino group substituted with benzyl group or the like, at the 4-position, and carbamoyl group which may be substituted, at the 5-position, is provided.
    Type: Application
    Filed: June 26, 2003
    Publication date: December 8, 2005
    Inventors: Shinya Nagashima, Hiroshi Nagata, Masahiro Iwata, Masaki Yokota, Hiroyuki Moritomo, Eiichi Nakai, Sadao Kuromitsu, Keiko Ohga, Makoto Takeuchi
  • Patent number: 6949543
    Abstract: The invention relates to a novel amide derivative which is an N-({[4-(substituted thiazol-4-yl)phenyl]carbamoyl}methyl)amide derivative having a characteristic in that an aryl or heteroaryl group as an aromatic ring group is directly substituted on the N atom of amido group. Since said amide derivative has excellent anti-herpesvirus action, it is useful as medicaments and antiviral agents, particularly as preventive or therapeutic agents for various diseases accompanied by Herpesviridae virus infections, illustratively, varicella (chickenpox) accompanied by varicella zoster virus infection, shingles accompanied by the recurrent infection of latent varicella zoster virus, labial herpes and herpes encephalitis accompanied by HSV-1 infection, genital herpes accompanied by HSV-2 and the like various herpesvirus infections.
    Type: Grant
    Filed: November 8, 2001
    Date of Patent: September 27, 2005
    Assignees: Yamanouchi Pharmaceutical Co., Ltd., Rational Drug Design Laboratories
    Inventors: Toru Kontani, Junji Miyata, Wataru Hamaguchi, Yoji Miyazaki, Hiroshi Suzuki, Eiichi Nakai, Shunji Kageyama
  • Publication number: 20040034232
    Abstract: The invention relates to a novel amide derivative which is an N-({[4-(substituted thiazol-4-yl)phenyl]carbamoyl}methyl)amide derivative having a characteristic in that an aryl or heteroaryl group as an aromatic ring group is directly substituted on the N atom of amido group. Since said amide derivative has excellent anti-herpesvirus action, it is useful as medicaments and antiviral agents, particularly as preventive or therapeutic agents for various diseases accompanied by Herpesviridae virus infections, illustratively, varicella (chickenpox) accompanied by varicella zoster virus infection, shingles accompanied by the recurrent infection of latent varicella zoster virus, labial herpes and herpes encephalitis accompanied by HSV-1 infection, genital herpes accompanied by HSV-2 and the like various herpesvirus infections.
    Type: Application
    Filed: May 12, 2003
    Publication date: February 19, 2004
    Inventors: Toru Kontani, Junji Miyata, Wataru Hamaguchi, Yoji Miyazaki, Hiroshi Suzuki, Eiichi Nakai, Shunji Kageyama
  • Publication number: 20030222833
    Abstract: An information processing apparatus displays contents data including first and second image data when viewing an object from a first direction and a second direction. The information processing apparatus includes an apparatus main body, a multi-view display device including at least first to second display units provided individually at a first face and a second face of the apparatus main body, and a control unit for displaying the first to second image data on the first to second display units.
    Type: Application
    Filed: February 6, 2003
    Publication date: December 4, 2003
    Applicant: Kabushiki Kaisha Toshiba
    Inventor: Eiichi Nakai
  • Patent number: 6432963
    Abstract: Pyrimidine-5-carboxamide derivatives represented by a general formula (I) or salts thereof [wherein each symbol has the following meaning; X: O, S, NR1, CO, NR1CO, CONR1, C═N—OR1 or a bond, Y: a lower alkylene group which may be substituted by OR1 or —NHR1, or a bond, Z: O, NR2 or a bond, A: H, or a lower alkyl which may have a substituent, a —CO-lower alkyl which may have a substituent, an aryl which may have a substituent, a heteroaryl which may have a substituent, a cycloalkyl which may have a substituent or a nitrogen-containing saturated heterocyclic group which may have a substituent, B: an aryl which may have a substituent or a heteroaryl group which may have a substituent, R1, R2: H, a lower alkyl or a —CO-lower alkyl group].
    Type: Grant
    Filed: June 15, 2000
    Date of Patent: August 13, 2002
    Assignee: Yamanouchi Pharmaceutical Co., Ltd.
    Inventors: Hiroyuki Hisamichi, Ryo Naito, Souichirou Kawazoe, Akira Toyoshima, Kazuhito Tanabe, Eiichi Nakai, Atsushi Ichikawa, Akiko Orita, Makoto Takeuchi