Patents by Inventor Masami Muraoka

Masami Muraoka 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: 20240071478
    Abstract: A semiconductor memory device comprises a first memory cell and a second memory cell. The semiconductor memory device is configured to be able to perform: a first operation which is a read operation or the like to the first memory cell; and a second operation which is a read operation or the like to the second memory cell. The semiconductor memory device transitions to a standby mode after performing the first operation in response to an input of a first command set and a second command set. The semiconductor memory device performs a charge share operation after the standby mode is released in response to an input of a third command set and a fourth command set during the standby mode. The semiconductor memory device performs the second operation using at least a part of an electric charge generated when the first operation is performed.
    Type: Application
    Filed: November 7, 2023
    Publication date: February 29, 2024
    Applicant: Kioxia Corporation
    Inventors: Hideyuki KATAOKA, Yoshinao SUZUKI, Mai SHIMIZU, Kazuyoshi MURAOKA, Masami MASUDA, Yoshikazu HOSOMURA
  • Patent number: 7329665
    Abstract: An optically active form of the quinazolinone derivatives represented by the general formula (1): [wherein Y represents a phenyl group or C2-C7 alkyl group; E represents —CH? or nitrogen atom; and R represents a C1-C4 alkyl group and so on], or pharmaceutically acceptable salts thereof, has a selective antagonism for the M3 muscarinic receptor and depressant action on the frequency of rhythmic bladder contractions, and it is useful for the treatment of pollakiuria and urinary incontinence.
    Type: Grant
    Filed: August 2, 2002
    Date of Patent: February 12, 2008
    Assignee: Dainippon Sumitomo Pharma Co., Ltd.
    Inventors: Masami Muraoka, Kazuki Matsui, Takaaki Yamamoto, Koji Morishita, Masatoshi Yuri, Seiji Katayama, Naohito Ohashi
  • Patent number: 7067528
    Abstract: Hydrates of N-[1-butyl-4-[3-[3-(hydroxy)propoxy]-phenyl]-1,2-dihydro-2-oxo-1,8-naphthyridin-3-yl]-N?-(2,6-diisopropyl-4-aminophenyl)urea hydrochloride of the formula: are quite excellent in stability than amorphous one and are more preferable for medicaments.
    Type: Grant
    Filed: August 14, 2002
    Date of Patent: June 27, 2006
    Assignee: Sumitomo Pharmaceuticals Co., Ltd.
    Inventors: Masami Muraoka, Satoshi Ohnuma, Hitoshi Ban
  • Publication number: 20050165057
    Abstract: A compound of the formula (1): wherein m and n are independently an integer of 0 to 4, and m+n=4; L is cycloalkyl, substituted cycloalkyl, aromatic group, or substituted aromatic group; Y is aryl or substituted aryl; R is hydrogen, alkyl, etc.; R31, R32, R33, R34, R35 and R36 are the same or different and are selected, if two or more exist, independently from hydrogen, alkyl, etc., or a prodrug thereof, or a pharmaceutically acceptable salt of the same, which exhibits ACAT inhibitory activity, and is useful as an agent for treatment of hyperlipidemia and atherosclerosis.
    Type: Application
    Filed: April 22, 2003
    Publication date: July 28, 2005
    Inventors: Hitoshi Ban, Masami Muraoka
  • Publication number: 20050032819
    Abstract: An optically active form of the quinazolinone derivatives represented by the general formula (1): [wherein Y represents a phenyl group or C2-C7 alkyl group; E represents —CH? or nitrogen atom; and R represents a C1-C4 alkyl group and so on], or pharmaceutically acceptable salts thereof, has a selective antagonism for the M3 muscarinic receptor and depressant action on the frequency of rhythmic bladder contractions, and it is useful for the treatment of pollakiuria and urinary incontinence.
    Type: Application
    Filed: August 2, 2002
    Publication date: February 10, 2005
    Inventors: Masami Muraoka, Kazuki Matsui, Takaaki Yamamoto, Koji Morishita, Masatoshi Yuri, Seiji Katayama, Naohito Ohashi
  • Patent number: 6645971
    Abstract: A compound given by general formula (1): [wherein T represents oxygen or sulfur atom, Y represents alkyl, cycloalkyl group, etc., ring W represents benzene ring, etc., R1 and R2 represent independently hydrogen atom, lower alkyl group, etc., and R3 represents hydrogen atom, alkyl group, etc. Z represents a group given by formula: {wherein A1 and A2 represent independently hydrogen atom, alkyl group, etc. and G represents straight chain alkylene having 1-6 of the carbon number, etc.} or a group given by formula: {wherein n represents 0, 1 or 2, ring E represents 4-8 membered saturated heterocyclic ring containing nitrogen atom(s), and A3 represents hydrogen atom, alkyl group, etc.}], its prodrug or pharmaceutically acceptable salt thereof is an antagonist against muscarinic receptor that is useful as anticholinergic medicaments, and therefore it is useful as pollakiuria or urinary incontinence remedy.
    Type: Grant
    Filed: April 10, 2001
    Date of Patent: November 11, 2003
    Assignee: Sumitomo Pharmaceuticals Company Limited
    Inventors: Masami Muraoka, Kazuki Matsui, Koji Morishita, Naohito Ohashi
  • Patent number: 6452008
    Abstract: A process for preparing a pyridone derivative (4), which comprises reacting the compound (1) with a hypochlorite or a hypobromite or with lead tetraacetate to give the compound (2), and reacting the compound (2) with the compound (3). Said process is preferably especially from the standpoint of safety. wherein R1 is hydrogen, alkyl, substituted alkyl, etc.; Y1 is hydrogen, alky, substituted alky, etc.; Y2 and Y3 are indenpently hydrogen, halogen, etc.; and L is alkyl, substituted alkyl, etc.
    Type: Grant
    Filed: May 14, 2001
    Date of Patent: September 17, 2002
    Assignee: Sumitomo Pharmaceuticals Company, Limited
    Inventors: Masami Muraoka, Koji Morishita, Nagisa Aida, Masashi Tanaka, Masatoshi Yuri, Naohito Ohashi
  • Patent number: 6420381
    Abstract: A compound of the formula (I): wherein Ring A is substituted or unsubstituted pyridine ring, Y is substituted or unsubstituted alkyl, etc., R1 is hydrogen, or substituted or unsubstituted alkyl, etc., R2 is hydrogen or lower alkyl, R3 is lower alkyl, Z is 1) —D1—Q [D1 is direct bond or divalent C1-8 hydrocarbon, etc., Q is hydroxy, carboxyl, etc.], or 2) —D2M—E—W [D2 is direct bond or divalent C1-8 hydrocarbon, etc., M is oxygen, sulfur, etc., E is direct bond or divalent C1-8 hydrocarbon, etc., W is hydroxyl, carboxyl, etc.], or a prodrug thereof, or a pharmaceutically acceptable salt of the same, which exhibits acyl-CoA: cholesterol acyl transferase (ACAT) inhibitory activity, and is useful as an agent for treatment of hyperlipidemia and atherosclerosis.
    Type: Grant
    Filed: February 9, 2001
    Date of Patent: July 16, 2002
    Assignee: Sumitomo Pharmaceuticals Company, Limited
    Inventors: Masami Muraoka, Hitoshi Ban, Naohito Ohashi
  • Publication number: 20010051732
    Abstract: A process for preparing a pyridone derivative (4), which comprises reacting the compound (1) with a hypochlorite or a hypobromite or with lead tetraacetate to give the compound (2), and reacting the compound (2) with the compound (3). Said process is preferably especially from the standpoint of safety.
    Type: Application
    Filed: May 14, 2001
    Publication date: December 13, 2001
    Applicant: SUMITOMO PHARMACEUTICALS COMPANY, LIMITED
    Inventors: Masami Muraoka, Koji Morishita, Nagisa Aida, Masashi Tanaka, Masatoshi Yuri, Naohito Ohashi
  • Patent number: 6300500
    Abstract: A process for preparing a pyridone derivative (4), which comprises reacting the compound (1) with a hypochlorite or a hypobromite or with lead tetraacetate to give the compound (2), and reacting the compound (2) with the compound (3). Said process is preferably especially from the standpoint of safety. wherein R1 is hydrogen, alkyl, substituted alkyl, etc.; Y1 is hydrogen, alky, substituted alky, etc.; Y2 and Y3 are indenpently hydrogen, halogen, etc.; and L is alkyl, substituted alky, etc.
    Type: Grant
    Filed: August 25, 2000
    Date of Patent: October 9, 2001
    Assignee: Sumitomo Pharmaceuticals Company, Limited
    Inventors: Masami Muraoka, Koji Morishita, Nagisa Aida, Masashi Tanaka, Masatoshi Yuri, Naohito Ohashi
  • Patent number: 6159974
    Abstract: LDL receptor gene expression promoters containing a 1,2,4-triazine derivative of the formula (I): ##STR1## wherein R.sup.1 is optionally substituted phenyl or heterocycle; R.sup.2 is optionally substituted phenyl, naphthyl, aralkyl, 5- or 6-membered aromatic heterocycle, alkyl, or alkenyl; X is O, S or NR.sup.4 ; R.sup.3 is optionally substituted phenyl, naphthyl, aralkyl, 5- to 6-membered aromatic heterocycle, alkyl, cycloalkyl or alkenyl, provided that when X is NR.sup.4, then it may form an optionally substituted nitrogen-containing heterocycle, or a pharmaceutically acceptable salt thereof, which can increase the expression dose (the amount of mRNA) of LDL receptor gene, and thus increase the amount of LDL receptor, and reduce the serum cholesterol level, and are useful in the treatment of hyperlipidemia.
    Type: Grant
    Filed: September 24, 1999
    Date of Patent: December 12, 2000
    Assignee: Sumitomo Pharmaceuticals Company, Limited
    Inventors: Yoshihide Ueno, Koji Morishita, Masami Muraoka, Naohito Ohashi
  • Patent number: 5843957
    Abstract: Naphthyridine derivative of the formula: ##STR1## wherein Ring A is substituted or unsubstituted pyridine, X is --N(R.sup.2)--CO--(R.sup.2 is H, alkyl, substituted alkyl, etc.), Z is a direct bond, --NH--, C.sub.1 -C.sub.2 alkylene, or --CH.dbd.CH--, Y is alkyl, substituted alkyl, aromatic group or substituted aromatic group, etc., B is alkyl, substituted alkyl, aromatic group or substituted aromatic group, or an acid addition salt thereof, these compounds having acyl-CoA: cholesterol acyl transferase inhibitory activity, and being useful as an agent for prophylaxis or treatment of hyperlipidemia, atherosclerosis, and related diseases thereof.
    Type: Grant
    Filed: November 25, 1997
    Date of Patent: December 1, 1998
    Assignee: Sumitomo Pharmaceuticals Company, Ltd.
    Inventors: Masami Muraoka, Katsuhisa Ioriya, Naohito Ohashi, Hideki Yagi
  • Patent number: 5556860
    Abstract: This invention is to provide quinazolinone derivatives, and their acid salts and quaternary ammonium salts, having an effect of preventing or treating diseases caused by calcium ion overload in cells, such as ischemic heart disease, ischemic cerebral disease and ischemic renal disease, and their usage. The quinazolinone derivatives are represented by the formula: ##STR1## typically, T represents an oxygen atom; Y represents a phenyl or cyclohexyl group; R.sup.1 represents a hydrogen or chlorine atom; R.sup.
    Type: Grant
    Filed: May 26, 1994
    Date of Patent: September 17, 1996
    Assignee: Sumitomo Pharmaceuticals Co., Ltd.
    Inventors: Masami Muraoka, Kazuki Matsui, Hirohiko Hasegawa, Atsuyuki Kojima
  • Patent number: 4849434
    Abstract: A novel 2-pyridylthiazolidin-4-one derivative represented by the general formula ##STR1## wherein Ar denotes an aryl group unsubstituted or substituted with a halogen atom or with a lower alkoxy group; X denotes a straight-chain or branched-chain lower alkylene group or a single bond; R denotes a hydrogen atom, lower alkyl, lower alkenyl, lower alkynyl, cycloalkyl, acyloxy, di(lower alkyl) amino, hydroxyl or aryl group, or denotes an aryl group substituted with a lower alkoxy group; and Py denotes a pyridyl group, and the acid addition salt thereof, which have an excellent platelet activating factor antagonsm.
    Type: Grant
    Filed: July 17, 1987
    Date of Patent: July 18, 1989
    Assignees: Sumitomo Pharmaceuticals Company, Limited, Sumitomo Chemical Company, Limited
    Inventors: Masao Enomoto, Masami Muraoka, Keiichi Ono, Atsuyuki Kojima, Toshio Atsumi, Yoshihiro Komuro, Yuzuru Sanemitsu, Masato Mizutani
  • Patent number: 4680307
    Abstract: A compound of the formula: ##STR1## wherein X.sup.1 is a free or an esterified carboxyl group, or a group of the formula: ##STR2## (R.sup.a and R.sup.b are each independently a hydrogen atom, a C.sub.1 -C.sub.4 alkyl group, a C.sub.3 -C.sub.7 cycloalkyl group, a benzyl group, a phenyl group, a phenyl group substituted with a halogen atom or a C.sub.1 -C.sub.4 alkyl group, or, when taken together with the adjacent nitrogen atom to which they are attached, they represent a 5 to 7 membered saturated heterocyclic group, Y.sup.1 is a group of the formula: ##STR3## (R.sup.6 is a hydrogen atom or C.sub.1 -C.sub.4 alkyl group), ##STR4## (R.sup.6 is as defined above), ##STR5## R.sup.1 is a hydrogen atom, a hydroxyl group or a protected hydroxyl group, R.sup.2 is a hydrogen atom or R.sup.1 and R.sup.2, when taken together, mean a shingle linkage to from a double bond between the carbon atoms which they are linked, R.sup.3 is a hydroxyl group or a protected hydroxyl group, R.sup.4 is a hydrogen atom or a C.sub.1 -C.sub.
    Type: Grant
    Filed: January 26, 1984
    Date of Patent: July 14, 1987
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Masami Muraoka, Toshio Nakamura, Akihiko Sugie, Keiichi Ono, Michihiro Yamamoto
  • Patent number: 4537989
    Abstract: A compound of the formula ##STR1## wherein X.sup.1 is a free or an esterified carboxyl group, or a group of the formula: ##STR2## (R.sup.a and R.sup.b are each independently a hydrogen atom, a C.sub.1 -C.sub.4 alkyl group, a C.sub.3 -C.sub.7 cycloalkyl group, a benzyl group, a phenyl group, a phenyl group substituted with a halogen atom or a C.sub.1 -C.sub.4 alkyl group, or, when taken together with the adjacent nitrogen atom to which they are attached, they represent a 5 to 7 membered saturated heterocyclic group), Y is a group of the formula: ##STR3## (R.sup.6 is a hydrogen atom or a C.sub.1 -C.sub.4 alkyl group) or ##STR4## (R.sup.6 is as defined above), R.sup.1 is a hydrogen atom, a hydroxyl group or a protected hydroxyl group, R.sup.2 is a hydrogen atom or R.sup.1 and R.sup.2, when taken together, mean a single linkage to form a double bond between the carbon atoms which they are linked, R.sup.3 is a hydroxyl group or a protected hydroxyl group, R.sup.4 is a hydrogen atom or a C.sub.1 -C.sub.
    Type: Grant
    Filed: April 15, 1983
    Date of Patent: August 27, 1985
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Keiichi Ono, Akihiko Sugie, Masami Muraoka, Michihiro Yamamoto