Patents by Inventor Shiuji Saito

Shiuji Saito 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).

  • Publication number: 20110213143
    Abstract: Provided are compounds having superior TAFIa inhibitory activity.
    Type: Application
    Filed: October 28, 2009
    Publication date: September 1, 2011
    Applicant: TAISHO PHARMACEUTICAL CO., LTD.
    Inventors: Hideaki Amada, Daisuke Matsuda, Masahiro Bohno, Shiuji Saito, Ayako Bohno
  • Publication number: 20080312435
    Abstract: An imine compound represented by the formula: wherein A represents a heterocyclic group; R1, R2, an R3 each represent a hydrogen atom, a halogen atom, a C1-10 alkyl group optionally substituted with an aryl group(s) substituted with a halogen atom(s), a C3-10 cycloalkyl group, a C1-6 haloalkyl group, a C1-10 alkoxy group, etc.; R4 represents an optionally substituted C1-10 alkyl, C2-6 alkenyl, or aryl group; R5 represents a hydrogen atom, a C1-10 alkoxy group, a C1-6 haloalkyl group, an optionally substituted C1-10 alkyl or C2-6 alkenyl group, an optionally substituted aryl or heterocyclic group, etc.; W represents —CO—, —CO—CO—, —CO—NH—, —CS—NH—, or —SO2—, or a cannabinoid-receptor agonist comprising said imine compound as an active ingredient. The imine compound of the present invention has a cannabinoid-receptor agonist effect, and is useful as a therapeutic or prophylactic drug for pains and autoimmune diseases.
    Type: Application
    Filed: October 31, 2005
    Publication date: December 18, 2008
    Applicant: TAISHO PHARMACEUTICAL CO., LTD.
    Inventors: Shiuji Saito, Hiroshi Ohta, Tomoko Ishizaki, Mitsukane Yoshinaga, Makoto Tatsuzuki, Yuji Yokobori, Yasumitsu Tomishima, Aki Morita, Yoshihisa Toda, Kimiko Tokugawa, Ayaka Kaku, Tomomi Murakami, Hiromitsu Yoshimura, Shingo Sekine, Takao Yoshimizu
  • Patent number: 6355663
    Abstract: This invention provides a substituted isoxazolylthiophene compound represented by the formula wherein R1 and R2 individually represent an alkyl group of 1-5 carbon atoms, R3 represents a cyano group or a group CONR5R6 (in which R5 and R6 individually represent a hydrogen atom or an alkyl group of 1-10 carbon atoms), R4 represents an alkyl group of 1-5 carbon atoms or a phenyl group, and n is an integer of 0-2, or a salt thereof. The compounds of the invention are useful for the treatment or prevention of various bone diseases or nerve diseases, because they specifically enhance the action of the cell differentiation induction factors found in a living body.
    Type: Grant
    Filed: March 1, 2001
    Date of Patent: March 12, 2002
    Assignee: Taisho Pharmaceutical Co., Ltd.
    Inventors: Masahiro Harada, Junko Takeda, Toshio Nakamura, Shiuji Saito
  • Patent number: 5521311
    Abstract: The present compounds represented by the formula: ##STR1## (wherein R.sup.1 is a phenyl group, a halophenyl group or a cycloalkyl group having 3 to 8 carbon atoms, R.sup.2 is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, R.sup.3 is a hydrogen atom, an alkyl group having 1 to 7 carbon atoms, a cycloalkyl group having 3 to 8 carbon atoms, an alkenyl group having 3 to 5 carbon atoms or a benzyl group, or R.sup.2 and R.sup.3 are bonded together to form a 5- to 7-membered heterocycle) and salts thereof have potent anti-inflammatory, antipyretic, analgesic and anti-allergic actions with less side effects such as gastrointestinal disorders and with such a high safety as to permit long-term administration.
    Type: Grant
    Filed: August 14, 1995
    Date of Patent: May 28, 1996
    Assignee: Taisho Pharmaceutical Co., Ltd.
    Inventors: Kensei Yoshikawa, Shiuji Saito, Yohichi Shimazaki, Mariko Kashiwa, Katsuo Hatayama
  • Patent number: 5374764
    Abstract: 5-Aminosulfonanilide compounds represented by the formula: ##STR1## (wherein R is a hydrogen atom, a formyl group, an acetyl group, a propionyl group, an n-butyryl group, an n-valeryl group, an ethoxyoxalyl group, an n-propoxyoxalyl group, a methoxycarbonylacetyl group or a 3-ethoxycarbonylpropionyl group) have potent anti-inflammatory, antipyretic, analgesic and anti-allergic actions, and therefore they are useful as anti-inflammatory, antipyretic, analgesic and anti-allergic agents.
    Type: Grant
    Filed: February 3, 1994
    Date of Patent: December 20, 1994
    Assignee: Taisho Pharmaceutical Co., Ltd.
    Inventors: Kensei Yoshikawa, Shiuji Saito, Yohichi Shimazaki, Mariko Kashiwa, Katsuo Hatayama
  • Patent number: 4885367
    Abstract: Sulfonanilide compounds represented by the formula ##STR1## wherein R.sup.1 is a lower alkyl group or a trifluoromethyl group, R.sup.2 is a cycloalkylidenemethyl group, a group of the formula --A--R.sup.3 (wherein A is an oxygen atom, a sulfur atom, a sulfynyl group or a sulfinyl group and R.sup.3 is a cycloalkyl group having 5-8 carbon atoms; a cycloalkyl group having 5-8 carbon atoms substituted by one or two of a lower alkyl group, an oxo group, a hydroxyl group or a methanesulfonyloxy group, a tetrahydropyranyl group; a tetrahydrothiopyranyl group; or a 1-methyl-piperidyl group) or a group of the formula --B--R.sup.4 (wherein B is a carbonyl group, a hydroxymethylene group or a methylene group, R.sup.4 is a cycloalkyl group having 5-8 carbon atoms) and the pharmaceutically acceptable salts thereof have anti-inflammatory activity.
    Type: Grant
    Filed: November 16, 1988
    Date of Patent: December 5, 1989
    Assignee: Taisho Pharmaceutical Co., Ltd.
    Inventors: Kensei Yoshikawa, Yutaka Ohuchi, Kazuto Sekiuchi, Shiuji Saito, Katsuo Hatayama, Kaoru Sota
  • Patent number: 4600540
    Abstract: Benzoylpropionic acid derivatives represented by the general formula ##STR1## (wherein R.sup.1 represents a hydrogen atom, a lower alkyl group or a benzyl group, R.sup.2 represents a lower alkyl group or a phenyl group, X represents a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxy group, a phenoxy group or a halogenophenoxy group, and Y represents a hydrogen atom or a lower alkyl group). The compounds have immunomodulative function and are effective for treatment of diseases caused by abnormal immunofunction.
    Type: Grant
    Filed: June 4, 1985
    Date of Patent: July 15, 1986
    Assignee: Taisho Pharmaceutical Co., Ltd.
    Inventors: Kazuyuki Tomisawa, Kazuya Kameo, Toru Matsunaga, Shiuji Saito, Kaoru Sota
  • Patent number: 4594197
    Abstract: 3-Benzoyl-2-mercaptopropionic acid derivatives represented by the general formula ##STR1## (wherein, X represents a hydrogen atom, a halogen atom, hydroxy group, a lower alkyl group or a lower alkoxy group, Y represents a hydrogen atom, a halogen atom, a lower alkyl group or a lower alkoxy group, Z represents a hydrogen atom or an acyl group, and R represents a hydrogen atom or a lower alkyl group). These compounds have immunomodulative function and are effective for the treatment of diseases caused by abnormal immunofunction.
    Type: Grant
    Filed: August 31, 1984
    Date of Patent: June 10, 1986
    Assignee: Taisho Pharmaceutical Co., Ltd.
    Inventors: Kazuyuki Tomisawa, Kazuya Kameo, Toru Matsunaga, Shiuji Saito, Yoshimoto Nakashima, Kaoru Sota
  • Patent number: 4541959
    Abstract: Diphenylsulfide derivatives represented by the general formula ##STR1## wherein, X represents a hydrogen atom, a chlorine atom or a methyl group, and R represents a hydrogen atom or a lower alkyl group. These diphenyl sulfides reduce lipids such as cholesterols and triglycerides in the blood of mammals.
    Type: Grant
    Filed: August 29, 1984
    Date of Patent: September 17, 1985
    Assignee: Taisho Pharmaceutical Co., Ltd.
    Inventors: Kazuyuki Tomisawa, Kazuya Kameo, Toru Matsunaga, Shiuji Saito, Yoshimoto Nakashima, Kaoru Sata