Patents by Inventor Yoshihiro Ohshita
Yoshihiro Ohshita 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).
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Publication number: 20210050720Abstract: In order to widen the options of power supply devise to be applied, this operation device is provided with: an operation unit that operates by the current supplied from a power supply; and an adjustment unit that lowers the value of the supplied current when the value of the supplied current exceeds a threshold value.Type: ApplicationFiled: March 5, 2019Publication date: February 18, 2021Applicant: NEC Platforms, Ltd.Inventor: Yoshihiro OHSHITA
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Patent number: 7713997Abstract: The present invention provides an agent which exhibits excellent antibacterial activity, low toxicity, improved bioavailability, and low binding rate to serum proteins. The present invention is directed to a pyridonecarboxylic acid derivative represented by formula (1): or a salt thereof, wherein R1 represents a methyl group, a fluorine atom, or a chlorine atom; R2 represents a hydrogen atom or a lower alkyl group; R3 represents an isopropyl group or a tert-butyl group; R4 represents a methyl group or a halogen atom; and R5 represents a fluorine atom or a chlorine atom. The present invention is also directed to an antibacterial agent and a medicament containing the derivative or the salt thereof as an active ingredient.Type: GrantFiled: November 17, 2005Date of Patent: May 11, 2010Assignee: Wakunaga Pharmaceutical Co., Ltd.Inventors: Akira Yazaki, Yasuhiro Kuramoto, Kenji Itoh, Kazusa Yoshikai, Yuzo Hirao, Yoshihiro Ohshita, Norihiro Hayashi, Hirotaka Amano, Takayuki Amago, Hitomi Takenaka
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Publication number: 20090149440Abstract: The present invention provides an agent which exhibits excellent antibacterial activity, low toxicity, improved bioavailability, and low binding rate to serum proteins. The present invention is directed to a pyridonecarboxylic acid derivative represented by formula (1): or a salt thereof, wherein R1 represents a methyl group, a fluorine atom, or a chlorine atom; R2 represents a hydrogen atom or a lower alkyl group; R3 represents an isopropyl group or a tert-butyl group; R4 represents a methyl group or a halogen atom; and R5 represents a fluorine atom or a chlorine atom. The present invention is also directed to an antibacterial agent and a medicament containing the derivative or the salt thereof as an active ingredient.Type: ApplicationFiled: November 17, 2005Publication date: June 11, 2009Applicant: WAKUNAGA PHARMACEUTICAL CO., LTDInventors: Akira Yazaki, Yasuhiro Kuramoto, Kenji Itoh, Kazusa Yoshikai, Yuzo Hirao, Yoshihiro Ohshita, Norihiro Hayashi, Hirotaka Amano, Takayuki Amago, Hitomi Takenaka
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Patent number: 6858625Abstract: This invention relates to 1-(6-amino-3,5-difluoropyridin-2-yl)-8-bromo-7-(3-ethylaminoazetidin-1-yl)-6-fluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid or a salt thereof, and also to a medicine containing the same. This compound has characteristic features that, when administered orally, it has extremely high blood half-life and bioavailability while retaining properties that it has extremely high antimicrobial effects and has low toxicity. It can be used widely as preventives, therapeutics and the like for various infectious diseases of human and animals.Type: GrantFiled: June 22, 2000Date of Patent: February 22, 2005Assignee: Wakunaga Pharmaceutical Co., Ltd.Inventors: Akira Yazaki, Yoshiko Niino, Yasuhiro Kuramoto, Yuzo Hirao, Yoshihiro Ohshita, Norihiro Hayashi, Hirotaka Amano
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Patent number: 6211375Abstract: A novel pyridonecarboxylic acid derivative or its salt exhibiting satisfactory antibacterial activities, intestinal absorption, metabolic stability, and reduced side effects, in particular, phototoxicity and cytotoxicity, as well as an antibacterial agent containing such pyridonecarboxylic acid derivative or its salt are provided. For such an object, a pyridonecarboxylic acid derivative represented by the following formula (1): (wherein R1 represents hydrogen atom, a halogen atom or a lower alkyl group; R2 represents hydrogen atom or a lower alkyl group; R3 represents substituted or unsubstituted amino group or hydroxyl group; and R4 represents hydrogen atom, a lower alkyl group, amino group or nitro group) or its salt is provided.Type: GrantFiled: January 20, 1999Date of Patent: April 3, 2001Assignee: Wakunaga Pharmaceutical Co., Ltd.Inventors: Akira Yazaki, Yoshiko Niino, Yoshihiro Ohshita, Norihiro Hayashi, Hirotaka Amano, Yuzo Hirao, Tamae Yamane
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Patent number: 6156903Abstract: A pyridonecarboxylic acid derivative represented by the following general formula (1): ##STR1## [wherein R.sup.1 represents hydrogen atom or a carboxyl protective group; R.sup.2 represents hydroxyl group, a lower alkoxy group, or a substituted or unsubstituted amino group; R.sup.3 represents hydrogen atom or a halogen atom; R.sup.4 represents hydrogen atom or a halogen atom; R.sup.5 represents a halogen atom or an optionally substituted saturated cyclic amino group; R.sup.6 represents hydrogen atom, a halogen atom, nitro group, or an optionally protected amino group; X, Y and Z may be the same or different and respectively represent nitrogen atom, --CH.dbd. or --CR.sup.7 .dbd. (wherein R.sup.7 represents a lower alkyl group, a halogen atom, or cyano group) (with the proviso that at least one of X, Y and Z represent the nitrogen atom), and W represents nitrogen atom or --CR.sup.8 .dbd. (wherein R.sup.Type: GrantFiled: June 10, 1999Date of Patent: December 5, 2000Assignee: Wakunaga Pharmaceutical Co., Ltd.Inventors: Akira Yazaki, Yoshiko Niino, Yoshihiro Ohshita, Yuzo Hirao, Hirotaka Amano, Norihiro Hayashi, Yasuhiro Kuramoto
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Patent number: 6136823Abstract: The invention relates to pyridonecarboxylic acid derivatives represented by the general formula (1): ##STR1## wherein R.sup.1 is --OH, a carboxy-protecting group or (alkyl)amino group, R.sup.2 is H, or --NO.sub.2, (protected) amino, (protected) hydroxyl, lower alkyl or lower alkoxyl group, R.sup.3 is a halogen atom, H, or --NO.sub.2, lower alkyl, lower alkoxyl or amino group, R.sup.4 is an azido, (substituted) hydrazino, (substituted) amino, lower alkoxyl or hydroxyl group, R.sup.5, R.sup.6 and R.sup.7 are independently H, --NO.sub.2, halogen atom or lower alkyl group, R.sup.8 is a --NO.sub.2, (substituted) amino, --OH or lower alkoxyl group, A is N or C--R.sup.12, in which R.sup.12 is H, halogen atom, or (substituted) lower alkyl, lower alkenyl, lower alkynyl, lower alkoxyl, lower alkylthio or nitro group, and B is N or C--R.sup.13, in which R.sup.13 is H or halogen atom, or salts thereof, and medicine comprising such a compound as an active ingredient.Type: GrantFiled: May 28, 1999Date of Patent: October 24, 2000Assignee: Wakunaga Pharmaceutical Co., Ltd.Inventors: Nobuya Sakae, Akira Yazaki, Yasuhiro Kuramoto, Jiro Yoshida, Yoshiko Niino, Yoshihiro Ohshita, Yuzo Hirao, Norihiro Hayashi, Hirotaka Amano
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Patent number: 6133284Abstract: A pyridonecarboxylic acid derivative represented by the following general formula (1): ##STR1## [wherein R.sup.1 represents hydrogen atom or a carboxyl protective group; R.sup.2 represents hydroxyl group, a lower alkoxy group, or a substituted or unsubstituted amino group; R.sup.3 represents hydrogen atom or a halogen atom; R.sup.4 represents hydrogen atom or a halogen atom; R.sup.5 represents a halogen atom or an optionally substituted saturated cyclic amino group; R.sup.6 represents hydrogen atom, a halogen atom, nitro group, or an optionally protected amino group; X, Y and Z may be the same or different and respectively represent nitrogen atom, --CH.dbd. or --CR.sup.7 .dbd. (wherein R.sup.7 represents a lower alkyl group, a halogen atom, or cyano group) (with the proviso that at least one of X, Y and Z represent the nitrogen atom), and W represents nitrogen atom or --CR.sup.8 .dbd. (wherein R.sup.Type: GrantFiled: June 10, 1999Date of Patent: October 17, 2000Assignee: Wakunaga Pharmaceutical Co., Ltd.Inventors: Akira Yazaki, Yoshiko Niino, Yoshihiro Ohshita, Yuzo Hirao, Hirotaka Amano, Norihiro Hayashi, Yasuhiro Kuramoto
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Patent number: 5998436Abstract: A pyridonecarboxylic acid derivative represented by the following general formula (1): ##STR1## [wherein R.sup.1 represents hydrogen atom or a carboxyl protective group; R.sup.2 represents hydroxyl group, a lower alkoxy group, or a substituted or unsubstituted amino group; R.sup.3 represents hydrogen atom or a halogen atom; R.sup.4 represents hydrogen atom or a halogen atom; R.sup.5 represents a halogen atom or an optionally substituted saturated cyclic amino group; R.sup.6 represents hydrogen atom, a halogen atom, nitro group, or an optionally protected amino group; X, Y and Z may be the same or different and respectively represent nitrogen atom, --CH.dbd. or --CR.sup.7 .dbd. (wherein R.sup.7 represents a lower alkyl group, a halogen atom, or cyano group) (with the proviso that at least one of X, Y and Z represent the nitrogen atom), and W represents nitrogen atom or --CR.sup.8 .dbd. (wherein R.sup.Type: GrantFiled: March 20, 1998Date of Patent: December 7, 1999Assignee: Wakunaga Pharmaceuticals Co., Ltd.Inventors: Akira Yazaki, Yoshiko Niino, Yoshihiro Ohshita, Yuzo Hirao, Hirotaka Amano, Norihiro Hayashi, Yasuhiro Kuramoto
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Patent number: 5910498Abstract: The invention provides a pyridonecarboxylic acid derivative of the following general formula (1): ##STR1## wherein R.sup.1 is a hydrogen atom or carboxy protecting group, R.sup.2 is a nitro or substituted or unsubstituted amino group, R.sup.3 is a halogen atom, each of R.sup.4 and R.sup.5, which may be the same or different, is a hydrogen atom, halogen atom, lower alkyl group or lower alkoxy group, A is a nitrogen atom or --CX.dbd. wherein X is a hydrogen atom, halogen atom, lower alkyl group or lower alkoxy group, and Z is a halogen atom or a saturated cyclic amino group which may have a substituent, or a salt thereof and an antibacterial agent comprising the same.Type: GrantFiled: July 8, 1997Date of Patent: June 8, 1999Assignee: Wakunaga Seiyaku Kabushiki KaishaInventors: Akira Yazaki, Jiro Yoshida, Yoshiko Niino, Yoshihiro Ohshita, Norihiro Hayashi, Hirotaka Amano, Yuzo Hirao, Yasuhiro Kuramoto
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Patent number: 4818623Abstract: A slide glass comprising a slide glass structure having a glass surface with silicic acid groups and a lipophilic functional group introduced into at least a part of said silicic acid groups. By the lipophilic group thus introduced, peel-off of the cell specimen does not readily occur.Type: GrantFiled: November 28, 1986Date of Patent: April 4, 1989Assignee: Wakunaga Seiyaku Kabushiki KaishaInventors: Toyoharu Hozumi, Yoshihiro Ohshita