Patents by Inventor Ryusuke Nakagawa

Ryusuke Nakagawa 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: 8580751
    Abstract: The invention provides esterified ?-galactosylceramides effective for cancer treatment and the like, and a medicament containing same. In particular, the invention relates to a compound represented by the formula (I): wherein R1 is a hydrocarbon group having a carbon number of 1 to 30, R2 is a hydrocarbon group having a carbon number of 1 to 20, R3 is a hydrogen atom or hydrocarbon group having a carbon number of 1 to 5, R4 and R5 are the same or different and each is a hydrogen atom or a hydrocarbon group having a carbon number of 1 to 5, or R4 and R5 in combination form a divalent hydrocarbon group having a carbon number of 1 to 5, and optionally form a ring structure together with the adjacent ethylenedioxy, or a salt thereof.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: November 12, 2013
    Assignee: Riken
    Inventors: Masao Shiozaki, Takuya Tashiro, Kenji Mori, Ryusuke Nakagawa, Hiroshi Watarai, Masaru Taniguchi
  • Patent number: 8551959
    Abstract: The invention provides a glycolipid effective for cancer treatment and the like and a synthetic intermediate therefor, as well as a medicament containing the glycolipid and the like.
    Type: Grant
    Filed: March 25, 2009
    Date of Patent: October 8, 2013
    Assignee: RIKEN
    Inventors: Takuya Tashiro, Kenji Mori, Masao Shiozaki, Ryusuke Nakagawa, Masaru Taniguchi, Hiroshi Watarai
  • Patent number: 8541326
    Abstract: The present invention relates to an optical member for deep ultraviolet having a wavelength of 250 nm or shorter, containing a synthetic silica glass which does not substantially contain a halogen element, has a maximum OH group content of less than 10 ppm by weight, has contents of ODC (oxygen deficient centers) and E-prime center of each less than 1×1014 cm?3, does not substantially contain SiH and peroxy linkage, and has a fictive temperature of 1,050° C. or lower.
    Type: Grant
    Filed: April 30, 2012
    Date of Patent: September 24, 2013
    Assignee: Asahi Glass Company, Limited
    Inventors: Ryusuke Morita, Takuya Nakagawa, Kei Iwata, Masaaki Takata
  • Patent number: 8299223
    Abstract: The invention provides a pseudoglycolipid effective for cancer treatment and the like and a novel synthesis intermediate therefor, as well as a medicament containing the pseudoglycolipid and the like. The inventive compound is represented by the formula (1), or a salt thereof, wherein each symbol is as defined in the specification.
    Type: Grant
    Filed: February 22, 2008
    Date of Patent: October 30, 2012
    Assignee: Riken
    Inventors: Takuya Tashiro, Kenji Mori, Ken-ichi Fuhshuku, Masaru Taniguchi, Ryusuke Nakagawa, Hiroshi Watarai
  • Publication number: 20110224158
    Abstract: The invention provides esterified ?-galactosylceramides effective for cancer treatment and the like, and a medicament containing same. In particular, the invention relates to a compound represented by the formula (I): wherein R1 is a hydrocarbon group having a carbon number of 1 to 30, R2 is a hydrocarbon group having a carbon number of 1 to 20, R3 is a hydrogen atom or hydrocarbon group having a carbon number of 1 to 5, R4 and R5 are the same or different and each is a hydrogen atom or a hydrocarbon group having a carbon number of 1 to 5, or R4 and R5 in combination form a divalent hydrocarbon group having a carbon number of 1 to 5, and optionally form a ring structure together with the adjacent ethylenedioxy, or a salt thereof.
    Type: Application
    Filed: September 11, 2009
    Publication date: September 15, 2011
    Applicant: RIKEN
    Inventors: Masao Shiozaki, Takuya Tashiro, Kenji Mori, Ryusuke Nakagawa, Hiroshi Watarai, Masaru Taniguchi
  • Publication number: 20110104188
    Abstract: The invention provides a glycolipid effective for cancer treatment and the like and a synthetic intermediate therefor, as well as a medicament containing the glycolipid and the like.
    Type: Application
    Filed: March 25, 2009
    Publication date: May 5, 2011
    Applicant: RIKEN
    Inventors: Takuya Tashiro, Kenji Mori, Masao Shiozaki, Ryusuke Nakagawa, Masaru Taniguchi, Hiroshi Watarai
  • Publication number: 20100062990
    Abstract: The invention provides a pseudoglycolipid effective for cancer treatment and the like and a novel synthesis intermediate therefor, as well as a medicament containing the pseudoglycolipid and the like. The inventive compound is represented by the formula (1), or a salt thereof, wherein each symbol is as defined in the specification.
    Type: Application
    Filed: February 22, 2008
    Publication date: March 11, 2010
    Applicant: RIKEN
    Inventors: Takuya Tashiro, Kenji Mori, Ken-ichi Fuhshuku, Masaru Taniguchi, Ryusuke Nakagawa, Hiroshi Watarai
  • Publication number: 20040077043
    Abstract: The present invention relates to an isolated human dendritic cell membrane molecule having the amino acid sequence represented by SEQ ID NO: 1 which shows a significant increase in expression with the maturation of human dendritic cells (DC), a variant thereof, a DNA encoding the same, and a method for separating or detecting dendritic cells using the membrane molecule or its variant.
    Type: Application
    Filed: March 11, 2003
    Publication date: April 22, 2004
    Inventors: Hiroshi Watarai, Yasunori Yamaguchi, Atsushi Hinohara, Ryusuke Nakagawa, Hiromi Ehara, Naoshi Imai
  • Patent number: 5674906
    Abstract: Stilbene compounds of the following formula (I) or their pharmaceutically acceptable salts are effective as carcinostatics and of low toxicity: ##STR1## wherein X represents a hydrogen atom or a nitrile group, and Y represents an amino acid acyl group.
    Type: Grant
    Filed: March 7, 1996
    Date of Patent: October 7, 1997
    Assignee: Ajinomoto Co., Inc.
    Inventors: Toshihiro Hatanaka, Koji Ohsumi, Takashi Tsuji, Yukio Nihei, Ryusuke Nakagawa, Kazuo Ohishi
  • Patent number: 5292757
    Abstract: 1,4-dihydropyridine derivatives of Formula 1 or pharmaceutically acceptable salts thereof: ##STR1## wherein the substituents are disclosed herein and which are useful against tumor cells which have acquired resistance to one or more drugs used as chemotherapeutic agents.
    Type: Grant
    Filed: April 24, 1992
    Date of Patent: March 8, 1994
    Assignee: Ajinomoto Company, Inc.
    Inventors: Koji Ohsumi, Takaaki Sekiyama, Ryusuke Nakagawa, Takashi Tsuji, Yoshihiro Morinaga, Kazuo Ohishi