Patents by Inventor Kazumasa Nara

Kazumasa Nara 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: 8911855
    Abstract: The present invention relates to a masking tape base material using a machine-made Japanese paper as a base paper. The machine-made Japanese paper comprises a mercerized softwood pulp and a kraft pulp. The weight percent of the mercerized softwood pulp in a mixture of the mercerized softwood pulp and the kraft pulp is from 10 to 70% by weight. The machine-made Japanese paper is impregnated with a resin having a glass transition temperature of not higher than ?25° C. in an amount of 20% by weight or more. One surface of the impregnated machine-made Japanese paper is further coated with a resin having a glass transition temperature (Tg) of from 0 to 40° C. in a dry coating amount of from 2 to 20 g/m2.
    Type: Grant
    Filed: January 16, 2012
    Date of Patent: December 16, 2014
    Assignee: KJ Specialty Paper Co., Ltd.
    Inventors: Noriaki Kawashima, Kazumasa Nara
  • Publication number: 20130260116
    Abstract: The present invention relates to an impregnation-coating type Japanese paper masking tape base material obtained by coating a resin having a glass transition temperature (Tg) of from 0 to 40° C. in a dry coating amount of from 2 to 20 g/m2 on one surface of a paper in which a machine-made Japanese paper having a basis weight of from 25 to 40 g/m2, in which a fiber component thereof includes a mercerized softwood pulp and a kraft pulp, and a blending ratio of the mercerized softwood pulp is from 10 to 70% by weight, is impregnated with a resin having a glass transition temperature of not higher than ?25° C. in an amount of 20% by weight or more.
    Type: Application
    Filed: January 16, 2012
    Publication date: October 3, 2013
    Applicant: KJ SPECIALTY PAPER CO., LTD.
    Inventors: Noriaki Kawashima, Kazumasa Nara
  • Patent number: 8530654
    Abstract: Crystals, amorphous substances, salts, and hydrates of a salt of methyl N-[3-(6,7-dimethoxy-2-methylaminoquinazolin-4-yl)phenyl]terephthalamic acid having PDE4 inhibitory action are provided. These compounds are useful for treating allergic diseases such as atopic dermatitis.
    Type: Grant
    Filed: February 15, 2008
    Date of Patent: September 10, 2013
    Assignee: Eisai R&D Management Co., Ltd.
    Inventors: Eiichi Yamamoto, Osamu Asano, Jun Niijima, Kazumasa Nara
  • Patent number: 8399520
    Abstract: The present invention provides a compound represented by the following formula (I); [wherein T represents a single bond, a C1-C4 alkylene group which may have a substituent and the like; formula (I-1) represents a single bond or a double bond; A represents a single bond, a bivalent 5- to 14-membered heterocyclic group which may have a substituent and the like; Y represents a single bond and the like; Z represents a methylene group and the like; ring G represents a phenylene group and the like which may condense with a 5- to 6-membered ring and may have a heteroatom; Ra and Rb are the same as or different from each other and represent a hydrogen atom and the like; W represents a single bond and the like; R? represents 1 to 4 independent hydrogen atoms and the like; and R? represents 1 to 4 independent hydrogen atoms and the like] or a salt thereof, or a hydrate thereof.
    Type: Grant
    Filed: March 15, 2011
    Date of Patent: March 19, 2013
    Assignee: Eisai R&D Management Co., Ltd.
    Inventors: Shinichi Hamaoka, Noritaka Kitazawa, Kazumasa Nara, Atsushi Sasaki, Atsushi Kamada, Tadashi Okabe
  • Publication number: 20120004315
    Abstract: The present invention provides a compound represented by the following formula (I); [wherein T represents a single bond, a C1-C4 alkylene group which may have a substituent and the like; formula (I-1) represents a single bond or a double bond; A represents a single bond, a bivalent 5- to 14-membered heterocyclic group which may have a substituent and the like; Y represents a single bond and the like; Z represents a methylene group and the like; ring G represents a phenylene group and the like which may condense with a 5- to 6-membered ring and may have a heteroatom; Ra and Rb are the same as or different from each other and represent a hydrogen atom and the like; W represents a single bond and the like; R? represents 1 to 4 independent hydrogen atoms and the like; and R? represents 1 to 4 independent hydrogen atoms and the like] or a salt thereof, or a hydrate thereof.
    Type: Application
    Filed: March 15, 2011
    Publication date: January 5, 2012
    Inventors: Shinichi Hamaoka, Noritaka Kitazawa, Kazumasa Nara, Atsushi Sasaki, Atsushi Kamada, Tadashi Okabe
  • Patent number: 7960412
    Abstract: The present invention provides a compound represented by the following formula (I); [wherein T represents a single bond, a C1-C4 alkylene group which may have a substituent and the like; ??(I-1) formula (I-1) represents a single bond or a double bond; A represents a single bond, a bivalent 5- to 14-membered heterocyclic group which may have a substituent and the like; Y represents a single bond and the like; Z represents a methylene group and the like; ring G represents a phenylene group and the like which may condense with a 5- to 6-membered ring and may have a heteroatom; Ra and Rb are the same as or different from each other and represent a hydrogen atom and the like; W represents a single bond and the like; R? represents 1 to 4 independent hydrogen atoms and the like; and R? represents 1 to 4 independent hydrogen atoms and the like] or a salt thereof, or a hydrate thereof.
    Type: Grant
    Filed: August 20, 2009
    Date of Patent: June 14, 2011
    Assignee: Eisai R&D Management Co., Ltd.
    Inventors: Shinichi Hamaoka, Noritaka Kitazawa, Kazumasa Nara, Atsushi Sasaki, Atsushi Kamada, Tadashi Okabe
  • Patent number: 7834049
    Abstract: The present invention provides an integrin expression inhibitor, and an agent for treating arterial sclerosis, psoriasis, cancer, retinal angiogenesis, diabetic retinopathy or inflammatory diseases, an anticoagulant, or a cancer metastasis suppressor on the basis of an integrin inhibitory action.
    Type: Grant
    Filed: April 4, 2005
    Date of Patent: November 16, 2010
    Assignee: Eisai R&D Management Co., Ltd.
    Inventors: Toshiaki Wakabayashi, Yasuhiro Funahashi, Naoko Hata, Taro Semba, Yuji Yamamoto, Toru Haneda, Takashi Owa, Akihiko Tsuruoka, Junichi Kamata, Tadashi Okabe, Keiko Takahashi, Kazumasa Nara, Shinichi Hamaoka, Norihiro Ueda
  • Publication number: 20100267754
    Abstract: The present invention provides an integrin expression inhibitor, and an agent for treating arterial sclerosis, psoriasis, cancer, retinal angiogenesis, diabetic retinopathy or inflammatory diseases, an anticoagulant, or a cancer metastasis suppressor on the basis of an integrin inhibitory action.
    Type: Application
    Filed: June 10, 2010
    Publication date: October 21, 2010
    Inventors: Toshiaki WAKABAYASHI, Yasuhiro Funahashi, Naoko Hata, Taro Semba, Yuji Yamamoto, Toru Haneda, Takashi Owa, Akihiko Tsuruoka, Junichi Kamata, Tadashi Okabe, Keiko Takahashi, Kazumasa Nara, Shinichi Hamaoka, Norihiro Ueda
  • Patent number: 7790885
    Abstract: A process for preparing a compound represented by the formula (I): comprising reacting a compound represented by the formula (II) or salt thereof: with a compound represented by the formula (III): in the presence of a condensation reagent, wherein R1 represents 1) optionally substituted azetidin-1-yl, 2) optionally substituted pyrrolidin-1-yl, 3) optionally substituted piperidin-1-yl, etc.; R2, R3, R4 and R5 may be the same or different and each represents hydrogen or fluorine; and R6 represents hydrogen or fluorine.
    Type: Grant
    Filed: August 27, 2007
    Date of Patent: September 7, 2010
    Assignee: Eisai R&D Management Co., Ltd.
    Inventors: Mitsuo Nagai, Tomohiro Matsushima, Atsushi Kamada, Kazunori Wakasugi, Shuji Shirotori, Shinya Abe, Kazumasa Nara, Takahisa Sakaguchi
  • Publication number: 20100217001
    Abstract: Disclosed is a commercially advantageous method for producing a pyrazole fused ring derivative (such as a 7-phenylpyrazolo[1,5-a]pyridine derivative).
    Type: Application
    Filed: October 17, 2008
    Publication date: August 26, 2010
    Inventors: Keizo Sato, Kazumasa Nara, Naoyuki Shimomura
  • Publication number: 20090325930
    Abstract: The present invention provides a compound represented by the following formula (I); [wherein T represents a single bond, a C1-C4 alkylene group which may have a substituent and the like; ??(I-1) formula (I-1) represents a single bond or a double bond; A represents a single bond, a bivalent 5- to 14-membered heterocyclic group which may have a substituent and the like; Y represents a single bond and the like; Z represents a methylene group and the like; ring G represents a phenylene group and the like which may condense with a 5- to 6-membered ring and may have a heteroatom; Ra and Rb are the same as or different from each other and represent a hydrogen atom and the like; W represents a single bond and the like; R? represents 1 to 4 independent hydrogen atoms and the like; and R? represents 1 to 4 independent hydrogen atoms and the like] or a salt thereof, or a hydrate thereof.
    Type: Application
    Filed: August 20, 2009
    Publication date: December 31, 2009
    Inventors: Shinichi Hamaoka, Noritaka Kitazawa, Kazumasa Nara, Atsushi Sasaki, Atsushi Kamada, Tadashi Okabe
  • Patent number: 7612114
    Abstract: The present invention provides a compound represented by the following formula (I); [wherein T represents a single bond, a C1-C4 alkylene group which may have a substituent and the like; formula (I-1) represents a single bond or a double bond; A represents a single bond, a bivalent 5- to 14-membered heterocyclic group which may have a substituent and the like; Y represents a single bond and the like; Z represents a methylene group and the like; ring G represents a phenylene group and the like which may condense with a 5- to 6-membered ring and may have a heteroatom; Ra and Rb are the same as or different from each other and represent a hydrogen atom and the like; W represents a single bond and the like; R? represents 1 to 4 independent hydrogen atoms and the like; and R? represents 1 to 4 independent hydrogen atoms and the like] or a salt thereof, or a hydrate thereof.
    Type: Grant
    Filed: June 22, 2005
    Date of Patent: November 3, 2009
    Assignee: Eisai R&D Management Co., Ltd.
    Inventors: Shinichi Hamaoka, Noritaka Kitazawa, Kazumasa Nara, Atsushi Sasaki, Atsushi Kamada, Tadashi Okabe
  • Publication number: 20090163715
    Abstract: A compound represented by the general formula below or a salt thereof is a useful intermediate in the production of a [2-(3,3,5,5-tetramethylcyclohexyl)phenyl]piperazine compound that has excellent cell adhesion inhibitory effect and cell invasion inhibitory effect and therefore is useful as a therapeutic or prophylactic agent for various inflammatory diseases and autoimmune diseases induced by the adhesion and invasion of leukocytes, such as inflammatory bowel diseases (particularly ulcerative colitis or Crohn's disease), irritable bowel syndrome, rheumatoid arthritis, psoriasis, multiple sclerosis, asthma and atopic dermatitis. wherein R1 and R2 independently represent hydrogen or a protecting group for an amino group, or R1 and R2 bond together to form an optionally substituted pyrrole ring.
    Type: Application
    Filed: May 25, 2006
    Publication date: June 25, 2009
    Applicant: EISAI R&D MANAGEMENT CO., LTD.
    Inventors: Mitsuo Nagai, Kazumasa Nara, Kazunori Wakasugi, Toshihiko Naito
  • Publication number: 20090062539
    Abstract: Crystals, amorphous substances, salts, and hydrates of salt of methyl N-[3-(6,7-dimethoxy-2-methylaminoquinazolin-4-yl)phenyl]terephthalamic acid have PDE4 inhibitory action and are useful for treating allergic diseases such as atopic dermatitis.
    Type: Application
    Filed: February 15, 2008
    Publication date: March 5, 2009
    Applicant: Eisai R&D Management Co., Ltd.
    Inventors: Eiichi YAMAMOTO, Osamu Asano, Jun Niijima, Kazumasa Nara, Kazuki Miyazaki
  • Publication number: 20080214815
    Abstract: A process for preparing a compound represented by the formula (I): comprising reacting a compound represented by the formula (II) or salt thereof: with a compound represented by the formula (III): in the presence of a condensation reagent, wherein R1 represents 1) optionally substituted azetidin-1-yl, 2) optionally substituted pyrrolidin-1-yl, 3) optionally substituted piperidin-1-yl, etc.; R2, R3, R4 and R5 may be the same or different and each represents hydrogen or fluorine; and R6 represents hydrogen or fluorine.
    Type: Application
    Filed: August 27, 2007
    Publication date: September 4, 2008
    Applicant: Eisai R&D Management Co., Ltd.
    Inventors: Mitsuo Nagai, Tomohiro Matsushima, Atsushi Kamada, Kazunori Wakasugi, Shuji Shirotori, Shinya Abe, Kazumasa Nara, Takahisa Sakaguchi
  • Publication number: 20060116364
    Abstract: The present invention provides a compound represented by the following formula [wherein T represents a single bond, a C1-C4 alkylene group which may have a substituent and the like; formula (I-1) represents a single bond or a double bond; A represents a single bond, a bivalent 5- to 14-membered heterocyclic group which may have a substituent and the like; Y represents a single bond and the like; Z represents a methylene group and the like; ring G represents a phenylene group and the like which may condense with a 5- to 6-membered ring and may have a heteroatom; Ra and Rb are the same as or different from each other and represent a hydrogen atom and the like; W represents a single bond and the like; R? represents 1 to 4 independent hydrogen atoms and the like; and R? represents 1 to 4 independent hydrogen atoms and the like] or a salt thereof, or a hydrate thereof
    Type: Application
    Filed: June 22, 2005
    Publication date: June 1, 2006
    Applicant: Eisai Co., Ltd.
    Inventors: Shinichi Hamaoka, Noritaka Kitazawa, Kazumasa Nara, Atsushi Sasaki, Atsushi Kamada, Tadashi Okabe
  • Publication number: 20050176712
    Abstract: The present invention provides an integrin expression inhibitor, and an agent for treating arterial sclerosis, psoriasis, cancer, retinal angiogenesis, diabetic retinopathy or inflammatory diseases, an anticoagulant, or a cancer metastasis suppressor on the basis of an integrin inhibitory action.
    Type: Application
    Filed: April 4, 2005
    Publication date: August 11, 2005
    Inventors: Toshiaki Wakabayashi, Yasuhiro Funahashi, Naoko Hata, Taro Semba, Yuji Yamamoto, Toru Haneda, Takashi Owa, Akihiko Tsuruoka, Junichi Kamata, Tadashi Okabe, Keiko Takahashi, Kazumasa Nara, Shinichi Hamaoka, Norihiro Ueda
  • Patent number: 6787534
    Abstract: The present invention provides a sulfonamide- or sulfonylurea-containing heterocyclic compounds. Specifically, it provides a heterocyclic compound represented by the formula (I), a pharmacologically acceptable salt thereof or a hydrate of them.
    Type: Grant
    Filed: June 10, 2002
    Date of Patent: September 7, 2004
    Assignee: Eisai Co., Ltd.
    Inventors: Toru Haneda, Akihiko Tsuruoka, Junichi Kamata, Tadashi Okabe, Keiko Takahashi, Kazumasa Nara, Shinichi Hamaoka, Norihiro Ueda, Toshiaki Wakabayashi, Yasuhiro Funahashi, Taro Semba, Naoko Hata, Yuji Yamamoto, Yoichi Ozawa, Naoko Tsukahara, Takashi Owa
  • Publication number: 20040018192
    Abstract: The present invention provides an integrin expression inhibitor, and an agent for treating arterial sclerosis, psoriasis, cancer, retinal angiogenesis, diabetic retinopathy or inflammatory diseases, an anticoagulant, or a cancer metastasis suppressor on the basis of an integrin inhibitory action. Namely, it provides an integrin expression inhibitor comprising, as an active ingredient, a sulfonamide compound represented by the following formula (I), a pharmacologically acceptable salt thereof or a hydrate of them.
    Type: Application
    Filed: July 18, 2002
    Publication date: January 29, 2004
    Inventors: Toshiaki Wakabayashi, Yasuhiro Funahashi, Naoko Hata, Taro Semba, Yuji Yamamoto, Toru Haneda, Takashi Owa, Akihiko Tsuruoka, Junichi Kamata, Tadashi Okabe, Keiko Takahashi, Kazumasa Nara, Shinichi Hamaoka, Norihiro Ueda
  • Patent number: 6673787
    Abstract: The present invention creates a novel antiangiogenic agent and provides an antitumor agent which shows high safety as compared with conventional antitumor agents, has a sure effect and is able to be administered for a long period. That is, it provides an indole compound represented by the following formula (I), its pharmacologically acceptable salt or hydrates thereof. In the formula, R1 represents hydrogen atom, a halogen atom or cyano group; R2 and R3 are the same as or different from and each represents hydrogen atom, a C1-C4 lower alkyl group or a halogen atom; R4 represents hydrogen atom or a C1-C4 lower alkyl group; and the ring A represents cyanophenyl group, aminosulfonylphenyl group, aminopyridyl group, aminopyrimidyl group, a halopyridyl group or cyanothiophenyl group, provided that the case where all of R1, R2 and R3 are hydrogen atoms, where both R2 and R3 are hydrogen atoms or where the ring A is aminosulfonyl group and both R1 and R2 are halogen atoms is excluded.
    Type: Grant
    Filed: March 18, 2002
    Date of Patent: January 6, 2004
    Assignee: Eisai Co., Ltd.
    Inventors: Toru Haneda, Akihiko Tsuruoka, Junichi Kamata, Tadashi Okabe, Keiko Takahashi, Kazumasa Nara, Shinichi Hamaoka, Norihiro Ueda, Takashi Owa, Toshiaki Wakabayashi, Yasuhiro Funahashi, Taro Semba, Naoko Hata, Yuji Yamamoto, Yoichi Ozawa, Noako Tsukahara