Patents by Inventor Yukiyasu Murakami
Yukiyasu Murakami 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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Patent number: 11487433Abstract: Described embodiments include memory systems that may shadow certain data stored in a first memory device (e.g. NAND flash device) onto a second memory device (e.g. DRAM device). Memory systems may train and/or re-organize stored data to facilitate the selection of data to be shadowed. Initial responses to memory commands may be serviced from the first memory device, which may have a lower latency than the second memory device. The remaining data may be serviced from the second memory device. A controller may begin to access the remaining data while the initial response is being provided from the first memory device, which may reduce the apparent latency associated with the second memory device.Type: GrantFiled: April 20, 2020Date of Patent: November 1, 2022Assignee: Micron Technology, Inc.Inventors: Yi Chen, Yukiyasu Murakami
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Publication number: 20200241764Abstract: Described embodiments include memory systems that may shadow certain data stored in a first memory device (e.g. NAND flash device) onto a second memory device (e.g. DRAM device). Memory systems may train and/or re-organize stored data to facilitate the selection of data to be shadowed. Initial responses to memory commands may be serviced from the first memory device, which may have a lower latency than the second memory device. The remaining data may be serviced from the second memory device. A controller may begin to access the remaining data while the initial response is being provided from the first memory device, which may reduce the apparent latency associated with the second memory device.Type: ApplicationFiled: April 20, 2020Publication date: July 30, 2020Applicant: MICRON TECHNOLOGY, INC.Inventors: YI CHEN, YUKIYASU MURAKAMI
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Patent number: 10664171Abstract: Described embodiments include memory systems that may shadow certain data stored in a first memory device (e.g. NAND flash device) onto a second memory device (e.g. DRAM device). Memory systems may train and/or re-organize stored data to facilitate the selection of data to be shadowed. Initial responses to memory commands may be serviced from the first memory device, which may have a lower latency than the second memory device. The remaining data may be serviced from the second memory device. A controller may begin to access the remaining data while the initial response is being provided from the first memory device, which may reduce the apparent latency associated with the second memory device.Type: GrantFiled: April 10, 2017Date of Patent: May 26, 2020Assignee: Micron Technology, Inc.Inventors: Yi Chen, Yukiyasu Murakami
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Publication number: 20170212694Abstract: Described embodiments include Memory Systems that may shadow certain data stored in a first memory device (e.g. NAND flash device) onto a second memory device (e.g. DRAM device). Memory systems may train and/or re-organize stored data to facilitate the selection of data to be shadowed. Initial responses to memory commands may be serviced from the first memory device, which may have a lower latency than the second memory device. The remaining data may be serviced from the second memory device. A controller may begin to access the remaining data while the initial response is being provided from the first memory device, which may reduce the apparent latency associated with the second memory device.Type: ApplicationFiled: April 10, 2017Publication date: July 27, 2017Applicant: MICRON TECHNOLOGY, INC.Inventors: YI Chen, Yukiyasu Murakami
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Patent number: 9645919Abstract: Described embodiments include memory systems that may shadow certain data stored in a first memory device (e.g. NAND flash device) onto a second memory device (e.g. DRAM device). Memory systems may train and/or re-organize stored data to facilitate the selection of data to be shadowed. Initial responses to memory commands may be serviced from the first memory device, which may have a lower latency than the second memory device. The remaining data may be serviced from the second memory device. A controller may begin to access the remaining data while the initial response is being provided from the first memory device, which may reduce the apparent latency associated with the second memory device.Type: GrantFiled: March 14, 2013Date of Patent: May 9, 2017Assignee: Micron Technology, Inc.Inventors: Yi Chen, Yukiyasu Murakami
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Publication number: 20150363120Abstract: Methods and memories for embedded systems, and systems with managed memories, are provided. In one such method, a managed memory determines when housekeeping operations are indicated, conveys that information to a host, and the host initiates the housekeeping operation at a time determined by the host not to affect real-time system operation.Type: ApplicationFiled: June 25, 2013Publication date: December 17, 2015Applicant: MICRON TECHNOLOGY, INC.Inventors: Yi Chen, Yukiyasu Murakami
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Publication number: 20140281161Abstract: Described embodiments include memory systems that may shadow certain data stored in a first memory device (e.g. NAND flash device) onto a second memory device (e.g. DRAM device). Memory systems may train and/or re-organize stored data to facilitate the selection of data to be shadowed. Initial responses to memory commands may be serviced from the first memory device, which may have a lower latency than the second memory device. The remaining data may be serviced from the second memory device. A controller may begin to access the remaining data while the initial response is being provided from the first memory device, which may reduce the apparent latency associated with the second memory device.Type: ApplicationFiled: March 14, 2013Publication date: September 18, 2014Applicant: MICRON TECHNOLOGY, INC.Inventors: Yi Chen, Yukiyasu Murakami
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Patent number: 5616715Abstract: A process is provided for producing diastereoisomer A or a pharmaceutically acceptable acid addition salt of 2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylic acid 3-(1-benzylpyrrolidin-3-yl) ester 5-methyl ester which comprises subjecting a mixture of diastereoisomers A and B of 2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylic acid 3-(1-benzylpyrrolidin-3-yl) ester 5-methyl ester to column chromatography using silica gel as a carrier and a mixture of ethyl acetate and acetic acid as an eluant, and then separating the acetate of diastereoisomer A from the eluate, or treating the acetate with a base, or further treating the resulting diastereoisomer A with a pharmaceutically acceptable acid.Type: GrantFiled: June 19, 1995Date of Patent: April 1, 1997Assignee: Yamanouchi Pharmaceutical Co., Ltd.Inventors: Kazuharu Tamazawa, Tadao Kojima, Hideki Arima, Yukiyasu Murakami, Yasuo Isomura, Minoru Okada, Toichi Takenaka, Kiyoshi Takanobu
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Patent number: 5463064Abstract: A dextro-rotatory optical isomer of diastereoisomer A of (.+-.)-2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylic acid 3-(1-benzylpyrrolidin-3-yl)ester 5-methyl ester is provided having the formula ##STR1## and wherein the melting point of the hydrochloride of the dextro-rotatory optical isomer is 223.degree. to 230.degree. C. (decomp.), or a pharmaceutically acceptable acid addition salt thereof.Type: GrantFiled: May 5, 1994Date of Patent: October 31, 1995Assignee: Yamanouchi Pharmaceutical Co., Ltd.Inventors: Kazuharu Tamazawa, Tadao Kojima, Hideki Arima, Yukiyasu Murakami, Yasuo Isomura, Minoru Okada, Kiyoshi Takanobu, Toichi Takenaka
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Patent number: 5364872Abstract: The diastereoisomer A of a dihydropyridine-3,5-dicarboxylic acid ester derivative is provided as well as its pharmaceutically acceptable acid addition salts. The invention further discloses a process for producing the compounds and their use as medicaments in imparting vasodilating activity.Type: GrantFiled: January 23, 1992Date of Patent: November 15, 1994Assignee: Yamanouchi Pharmaceutical Co., Ltd.Inventors: Kazuharu Tamazawa, Tadao Kojima, Hideki Arima, Yukiyasu Murakami, Yasuo Isomura, Minoru Okada, Toichi Takenaka, Kiyoshi Takanobu
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Patent number: 4845211Abstract: Various 7-amino-3-substituted-methyl-3-cephem-4-carboxylic acids and lower alkylsily derivatives such as 7-amino-3-(2,3-cyclopenteno-1-pyridiniomethyl)-3-cephem-4 -carboxylic acid iodide and trimethylsilyl 7-trimethylsilylamino-3 -(5,6,7,8-tetrahydro-2-isoquinoliniomethyl)-3-cephem-4 -carboxylate iodide are valuable intermediates in the preparation of new and novel antibacterial agents. A new process for the preparation of these acids and the derivatives has been devised.Type: GrantFiled: May 4, 1987Date of Patent: July 4, 1989Assignee: Yamanouchi Pharmaceutical Co., Ltd.Inventors: Tadao Shibanuma, Kohji Nakano, Noriaki Nagano, Yukiyasu Murakami, Ryuichiro Hara, Akio Koda, Atsuki Yamazaki
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Patent number: 4699980Abstract: Various 7-amino-3-substituted-methyl-3-cephem-4-carboxylic acids and lower alkylsilyl derivatives such as 7-amino-3-(2,3-cyclopenteno-1-pyridiniomethyl)-3-cephem-4-carboxylic acid iodide and trimethylsilyl 7-trimethyl-silylamino-3-(5,6,7,8-tetrahydro-2-isoquinoliniomethyl)-3-ceph em-4-carboxylate iodide are valuable intermediates in the preparation of new and novel antibacterial agents. A new process for the preparation of these acids and the derivatives has been devised.Type: GrantFiled: February 8, 1985Date of Patent: October 13, 1987Assignee: Yamanouchi Pharmacutical Co., Ltd.Inventors: Tadao Shibanuma, Kohji Nakano, Noriaki Nagano, Yukiyasu Murakami, Ryuichiro Hara, Akio Koda, Atsuki Yamazaki
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Patent number: 4690921Abstract: Novel cephalosporin compounds of the formula ##STR1## wherein the wavy line means syn-form and anti-form bonds, R.sup.1 represents a cyanomethyl group, a thiocarbamoylmethyl group or an aminothiazolylmethyl group, and A represents a unsubstituted or substituted pyridinio group; and salts thereof. These compounds have excellent antibacterial activities.Type: GrantFiled: September 28, 1984Date of Patent: September 1, 1987Assignee: Yamanouchi Pharmaceutical Co., Ltd.Inventors: Tadao Shibanuma, Noriaki Nagano, Ryuichiro Hara, Kohji Nakano, Akio Koda, Atsuki Yamazaki, Yukiyasu Murakami
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Patent number: 4608373Abstract: Novel cephem compounds are provided having the formula: ##STR1## wherein R represents lower alkyl, which may be substituted with lower acyloxy, lower alkylthio or certain 5 or 6-membered heterocyclic ring-containing groups. The cephem compounds and salts thereof exhibit antibacterial activity to many pathogens. A process for producing the cephem compounds is also provided.Type: GrantFiled: December 12, 1983Date of Patent: August 26, 1986Assignee: Yamanouchi Pharmaceutical Co., Ltd.Inventors: Tadao Shibanuma, Kohji Nakano, Noriaki Nagano, Yukiyasu Murakami, Ryuichiro Hara
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Patent number: 4581353Abstract: A cephalosporin derivative of the formula ##STR1## wherein R is a hydrogen atom, a lower alkyl group which may have been substituted or a carbamoyl group which may have been substituted; R.sub.1 is hydrogen atom or a methoxy group; R.sub.2 is a hydrogen atom, an acyloxy group, or a nitrogen-containing 5-membered heterocyclic thio group which may have been substituted; R.sub.3 is a free amino group or an amino group having a protective group; and R.sub.4 is a free carboxy group or a carboxy group having a protective group or the salts thereof.The compound of this invention has an excellent antibacterial activity against gram negative bacteria and gram positive bacteria.Type: GrantFiled: July 11, 1984Date of Patent: April 8, 1986Assignee: Yamanouchi Pharmaceutical Co., Ltd.Inventors: Masaru Iwanami, Akio Koda, Yukiyasu Murakami
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Patent number: 4474779Abstract: Cephalosporin compounds represented by the general formula ##STR1## wherein R represents a group shown by formula ##STR2## wherein R.sup.1 represents a hydrogen atom or a lower alkyl group of 1-3 carbon atoms and R.sup.2 represents a hydrogen atom, a lower alkyl group of 1-3 carbon atoms, a phenyl group which may be substituted by an amino or hydroxy group, a cyano group, a carboxy group, or a carboxymethyl group; said R.sup.1 and R.sup.2 may form a cycloalkylidene group of 4-6 carbon atoms together with the carbon atom to which they are bonded) or a group shown by formula --CH.sub.2 --R.sup.3 (wherein R.sup.3 represents a hydrogen atom, a halogenomethyl group, a carbamoyl group, a carboxymethyl group, .alpha.4-carboxy-3-hydroxyisothiazol-5-yl-thiomethyl group, or .alpha.2-carboxyphenylthiomethyl group); R' represents a group shown by formula ##STR3## (wherein R.sub.a represents a carboxy group, a cyano group, or a carbamoyl group which may be substituted by a lower alkyl group of 1-3 carbon atoms and R.sub.Type: GrantFiled: October 7, 1982Date of Patent: October 2, 1984Assignee: Yamanouchi Pharmaceutical Co., Ltd.Inventors: Noriaki Nagano, Kohji Nakano, Tadao Shibanuma, Yukiyasu Murakami
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Patent number: 4311842Abstract: Cephalosporin compounds shown by the general formula ##STR1## wherein R.sub.1 represents hydrogen atom or an amino group; R.sub.2 and R.sub.3, which may be the same or different, each represents hydrogen atom, a hydroxy group, an oxo group, a lower alkyl group, or a lower alkoxy group; R.sub.4 represents a hydrogen atom or a lower alkoxy group; R.sub.5 represents an acetoxy group or --S--R.sub.6 (wherein R.sub.6 represents a 5- or 6-membered nitrogen-containing heterocyclic group which can be substituted by a lower alkyl group or lower alkoxy group); and A represents a monocyclic or bicyclic heterocyclic ring containing one or two atoms selected from the group consisting of nitrogen, oxygen and a sulfur atom; and pharmaceutically acceptable nontoxic salts thereof.These compounds have excellent antimicrobial activity against various microorganisms including resistant bacteria and are used for the treatment of bacterial infections of animals including human beings.Type: GrantFiled: July 2, 1979Date of Patent: January 19, 1982Assignee: Yamanouchi Pharmaceutical Co., Ltd.Inventors: Akio Koda, Ichiro Isaka, Yukiyasu Murakami
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Patent number: 3953428Abstract: The ampicillin derivatives represented by the general formula ##SPC1##Wherein R represents ##SPC2##Wherein R' represents a hydrogen atom, a methyl group, or an ethyl group and A and B each represents a hydrogen atom, a hydroxyl group, a methyl group, a methoxy group, a nitro group, or a halogen atom and further said B may combine with A on the carbon atom at the position to form ##SPC3##Group (where in Z represents --CH=N-- or --CH=CH-- and an R.sup.2 represents a hydrogen atom, a hydroxyl group, a phenyl group, a methyl group, an ethyl group, a methoxy group, an ethoxyl group, a methylthio group, a trifluoromethyl group, a halogen atom, a nitro group, an acetyl group, an acetamido group, a ethoxycarbonyloxy group, or a methylsulfonyl group and further R.sub.2 and ##SPC4##May form a thiazole, isothiazolo, pyrrolo, furo, or benzo fused ring which may be substituted by an oxo group, a methyl group, or an acetyl group) and the dotted line means an arbitrary double bond, ##SPC5##Wherein R.sup.3 and R.sup.Type: GrantFiled: May 1, 1973Date of Patent: April 27, 1976Assignee: Yamanouchi Pharmaceutical Co., Ltd.Inventors: Masuo Murakami, Ichiro Isaka, Akio Koda, Norio Kawahara, Teruya Ashiwagi, Yukiyasu Murakami, Kuniichiro Yano, Kohzi Nakano, Isao Souzo
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Patent number: 3939150Abstract: The penicillin derivatives represented by the formula ##SPC1##Wherein ring A represents a 5- or 6-membered single or fused ring which may contain one or more nitrogen atoms, an oxygen atom, or a sulfur atom; R.sup.1, R.sup.2, and R.sup.3, which may be the same or different, each represents a hydrogen atom, a hydroxy group, a lower alkyl group, a nitro group, a halogen atom, or an oxo group; and B represents a p-hydroxyphenyl group or a 1,4-cyclohexadien -1-yl group, and their nontoxic pharmaceutically acceptable salts.The compounds are antibiotics having excellent antibacterial activity in particular with respect to the Pseudomonas genus.Type: GrantFiled: October 15, 1974Date of Patent: February 17, 1976Assignee: Yamanouchi Pharmaceutical Co., Ltd.Inventors: Masuo Murakami, Ichiro Isaka, Khozi Nakano, Isao Souzu, Akio Koda, Teruaki Ozasa, Teruya Kashiwagi, Yukiyasu Murakami