Patents by Inventor Tohru Yasukohchi
Tohru Yasukohchi 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: 20050058620Abstract: A modified bio-related substance, wherein at least one poly(alkylene glycol)oxy group represented by the following formula (1) is combined in a molecule: wherein R is a hydrocarbon group having 1 to 24 carbon atoms, OA1 and OA2 are each an oxyalkylene group having 2 to 4 carbon atoms, R and OA2 are the same or different from each other in one molecule, n and m are each average number of moles of the oxyalkylene group added, n represents 0 to 1000, and m represents 10 to 1000.Type: ApplicationFiled: November 20, 2003Publication date: March 17, 2005Inventors: Ken-ichiro Nakamoto, Syunsuke Ohashi, Yuji Yamamoto, Kenji Sakanoue, Chika Itoh, Tohru Yasukohchi
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Patent number: 6812367Abstract: Polyethylene glycol for use in fields with application to a living body wherein the sum of the contents of ethylene glycol and diethylene glycol in the polyethylene glycol is less than or equal to that expressed in the following formula [I]: Sum ⁢ ⁢ of ⁢ ⁢ ethylene ⁢ ⁢ glycol ⁢ ⁢ and ⁢ ⁢ diethylene ⁢ ⁢ glycol ⁢ ⁢ contents ⁢Type: GrantFiled: June 18, 2003Date of Patent: November 2, 2004Assignee: NOF CorporationInventors: Kenji Sakanoue, Kouzoh Sanchika, Tohru Yasukohchi
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Patent number: 6679822Abstract: A polyalkylene oxide-modified phospholipid represented by formula (1) defined in the specification, has a monoacyl phospholipid content of not more than 3% by weight and a content of a base having a nitrogen atom of not more than 0.02% by weight.Type: GrantFiled: March 4, 2002Date of Patent: January 20, 2004Assignee: NOF CorporationInventors: Kazuhiro Kubo, Chika Itoh, Syunsuke Ohhashi, Tohru Yasukohchi
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Patent number: 6667292Abstract: Disclosed is a nitric monoxide metabolite-polyoxyalkylene-hemoglobin complex having a molecular weight of from 100,000 to 2,000,000 daltons, in which a polyoxyalkylene derivative is bound to from 10 to 30% in total of bindable amino groups in hemoglobin and a nitric monoxide metabolite is bound to from 10 to 100% in total of thiol groups of cysteine residues.Type: GrantFiled: February 8, 2000Date of Patent: December 23, 2003Assignees: Hokkaido University, NOF CorporationInventors: Akira Kitabatake, Ichiro Sakuma, Kunihiko Nakai, Tohru Yasukohchi
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Publication number: 20030216602Abstract: Polyethylene glycol for use in fields with application to a living body wherein the sum of the contents of ethylene glycol and diethylene glycol in the polyethylene glycol is less than or equal to that expressed in the following formula [I]: 1 Sum ⁢ ⁢ of ⁢ ⁢ ethylene ⁢ ⁢ glycol ⁢ ⁢ and ⁢ ⁢ diethylene ⁢ ⁢ glycol ⁢ ⁢ contents ⁢ ⁢ ( ppm ) = 150 × 2900 × 0.Type: ApplicationFiled: June 18, 2003Publication date: November 20, 2003Applicant: NOF CORPORATIONInventors: Kenji Sakanoue, Kouzoh Sanchika, Tohru Yasukohchi
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Patent number: 6620976Abstract: Polyethylene glycol for use in fields with application to a living body wherein the sum of the contents of ethylene glycol and diethylene glycol in the polyethylene glycol is less than or equal to that expressed in the following formula [I]: Sum ⁢ ⁢ of ⁢ ⁢ ethylene ⁢ ⁢ glycol ⁢ ⁢ and ⁢ ⁢ diethylene ⁢ ⁢ glycol ⁢ ⁢ contents ⁢Type: GrantFiled: March 27, 2002Date of Patent: September 16, 2003Assignee: NOF CorporationInventors: Kenji Sakanoue, Kouzoh Sanchika, Tohru Yasukohchi
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Publication number: 20030114523Abstract: A cell in which a reaction product of a substance to be modified and an amphipathic compound is non-covalently bound to a cell membrane, wherein said compound has the following features:Type: ApplicationFiled: August 5, 2002Publication date: June 19, 2003Applicant: NOF CorporationInventors: Teruyuki Nagamune, Chika Itoh, Tohru Yasukohchi, Syunsuke Ohhashi, Kazuhiro Kubo
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Publication number: 20020193640Abstract: Polyethylene glycol for use in fields with application to a living body wherein the sum of the contents of ethylene glycol and diethylene glycol in the polyethylene glycol is less than or equal to that expressed in the following formula [I]: 1 Sum ⁢ ⁢ of ⁢ ⁢ ethylene ⁢ ⁢ glycol ⁢ ⁢ and ⁢ ⁢ diethylene ⁢ ⁢ glycol ⁢ ⁢ contents ⁢ ⁢ ( ppm ) = 150 × 2900 × 0.Type: ApplicationFiled: March 27, 2002Publication date: December 19, 2002Applicant: NOF CORPORATIONInventors: Kenji Sakanoue, Kouzoh Sanchika, Tohru Yasukohchi
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Publication number: 20020165205Abstract: A polyalkylene oxide-modified phospholipid represented by formula (1) defined in the specification, has a monoacyl phospholipid content of not more than 3% by weight and a content of a base having a nitrogen atom of not more than 0.02% by weight.Type: ApplicationFiled: March 4, 2002Publication date: November 7, 2002Applicant: NOF CORPORATIONInventors: Kazuhiro Kubo, Chika Itoh, Syunsuke Ohhashi, Tohru Yasukohchi
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Patent number: 6455639Abstract: An oxirane derivative and process for preparation of the same, having a high purity characterized in terms of gel permeation chromatography and thin layer chromatography. The oxirane derivative is useful as a starting material for medical purposes, and mainly drug delivery systems.Type: GrantFiled: August 19, 1999Date of Patent: September 24, 2002Assignee: NOF CorporationInventors: Tohru Yasukohchi, Kouzoh Sanchika, Chika Itoh, Kei-ichi Maruyama
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Publication number: 20020120075Abstract: The present invention provides an high purity and high molecular oxirane derivative useful as a starting material for medical purposes, mainly drug delivery system, and a process for the preparation thereof.Type: ApplicationFiled: August 19, 1999Publication date: August 29, 2002Inventors: TOHRU YASUKOHCHI, KOUZOH SANCHIKA, CHIKA ITOH, KEI-ICHI MARUYAMA
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Patent number: 6313201Abstract: A composition is provided which comprises catalase modified with a copolymer (A) and a second copolymer, i.e., copolymer (B). The copolymer (A) comprises an alkenyl ether, maleic anhydride, and at least one monomer selected from the group consisting of unsaturated carboxylic acid, vinyl compound and olefin, and copolymer (B) consists of an ethylenically unsaturated monomer and a monomer selected from the group consisting of a monomer having a carboxyl group and a monomer having an acid anhydride group, or a salt of the copolymer (B).Type: GrantFiled: December 22, 1998Date of Patent: November 6, 2001Assignees: Mitsubishi Gas Chemical Company, Inc., NOF CorporationInventors: Satoshi Nanba, Tomomi Suzuki, Syunsuke Ohhashi, Tohru Yasukohchi
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Patent number: 5872191Abstract: A process for producing a polyoxyalkylene derivative substituted with succinimidyl group which comprises reacting a polyoxyalkylene compound having carboxyl group at ends with N-hydroxysuccinimide in an inert solvent in the presence of dicyclohexylcarbodiimide; dissolving an obtained reaction product into chloroform, an amount by weight of chloroform being 0.5 to 10 times as much as an amount by weight of the polyoxyalkylene compound having carboxyl group at ends; and crystallizing the polyoxyalkylene derivative substituted with succinimidyl group by adding an aliphatic hydrocarbon having 5 to 8 carbon atoms to a resultant solution, an amount by weight of the aliphatic hydrocarbon being 2 to 10 times as much as an amount by weight of chloroform. Materials can be handled with safety, and a highly pure polyoxyalkylene derivative substituted with succinimidyl group which does not cause turbidity in an aqueous solution and has an excellent quality as a material for drugs can be produced.Type: GrantFiled: June 3, 1997Date of Patent: February 16, 1999Assignee: NOF CorporationInventors: Kouzoh Sanchika, Tohru Yasukohchi, Kei-ichi Maruyama, Syunsuke Ohhashi
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Patent number: 5840973Abstract: A process for producing a polyoxyalkylenecarboxylic acid which comprises: (A) a step of obtaining a salt of a polyoxyalkylenecarboxylic acid by reacting a polyoxyalkylene compound having hydroxyl group at one or both ends of the molecule with a salt of a halogenated acetic acid or a salt of a halogenated propionic acid in an amount of 4 to 50 mol per 1 mol of the polyoxyalkylene compound and an alkali metal hydroxide in an amount of 8 to 70 mol per 1 mol of the polyoxyalkylene compound in the presence of an organic solvent at 80.degree. to 150.degree. C.Type: GrantFiled: August 27, 1997Date of Patent: November 24, 1998Assignee: NOF CorporationInventors: Tohru Yasukohchi, Kei-ichi Maruyama, Tsunekatsu Maruyama
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Patent number: 5767284Abstract: A process for producing a polyoxyalkylene derivative substituted with succinimidyl group which comprises reacting a polyoxyalkylene compound having carboxyl group at ends with N-hydroxysuccinimide in an inert solvent in the presence of dicyclohexylcarbodiimide; filtering an obtained reaction product; and crystallizing the polyoxyalkylene derivative substituted with succinimidyl group by adding isopropyl alcohol to a filtrate obtained by the filtration, an amount by weight of isopropyl alcohol being 1 to 100 times as much as an amount by weight of the polyoxyalkylene compound having carboxyl group at ends.Materials can be handled with safety in the process of the present invention, and a highly pure polyoxyalkylene derivative substituted with succinimidyl group which does not cause turbidity in an aqueous solution and has an excellent quality as a material for drugs can be produced.Type: GrantFiled: June 3, 1997Date of Patent: June 16, 1998Assignee: NOF CorporationInventors: Kouzoh Sanchika, Tohru Yasukohchi, Kei-ichi Maruyama, Syunsuke Ohhashi
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Patent number: 5540935Abstract: A reactive vesicle comprising, as a vesicle-forming component, a reactive phospholipid derivative represented by the following general formula (1) and a functional substance-fixed vesicle prepared by reacting the reactive vesicle with a functional substance: ##STR1## in which R.sup.1 C(.dbd.O) and R.sup.2 C(.dbd.O) each represent an aliphatic acyl group, R.sup.3 denotes hydrogen atom or methyl group, OA represents an oxyalkylene group of 2-4 carbon atoms, n indicates the average number of moles of added oxyalkylene group and is 1-1,000, p is 0 or 1, X represents ##STR2## with q and r each being an integer of 0 to 4 or 1 to 4, respectively, and M denotes hydrogen atom or an alkli metal atom.Type: GrantFiled: December 5, 1994Date of Patent: July 30, 1996Assignee: NOF CorporationInventors: Tsuyoshi Miyazaki, Kazuo Maruyama, Motoharu Iwatsuru, Kouzoh Sanchika, Mitsuhiro Nishida, Tohru Yasukohchi, Shigeru Kitano, Akinori Suginaka, Yoshihito Kadoma
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Patent number: 5463066Abstract: A novel and useful phospholipid derivative to be used for a reactive vesicle-forming agent, which is represented by the following general formula (1): ##STR1## in which R.sup.1 C(.dbd.O) and R.sup.2 C(.dbd.O) represent each an aliphatic acyl group, R.sup.3 denotes hydrogen atom or methyl group, OA represents an oxyalkylene group of 2-4 carbon atoms, n indicates the average addition mole number of added oxyalkylene group and is 1-1,000, p is 0 or 1, X represents ##STR2## with q and r being each an integer of 0 to 4 or 1 to 4, respectively, and M denotes hydrogen atom or an alkali metal atom.Type: GrantFiled: December 5, 1994Date of Patent: October 31, 1995Assignee: NOF CorporationInventors: Tsuyoshi Miyazaki, Kouzoh Sanchika, Mitsuhiro Nishida, Tohru Yasukohchi, Shigeru Kitano, Akinori Suginaka, Yoshihito Kadoma
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Patent number: 5332523Abstract: A dispersion stabilizing agent for inorganic powder in an oily material, comprising a copolymer of (i) a polyoxyalkylene derivative represented by the general formula [I] below with (ii) one or more of maleic acid and the derivatives thereof selected from the group of maleic anhydride, maleic acid, maleic acid salts, maleic acid amides, and maleic acid esters, ##STR1## where Z is a residue of a compound having 2-8 hydroxyl groups, AO is an oxyalkylene group having 2-18 carbon atoms, R.sup.1 is an unsaturated hydrocarbon group having 2-5 carbon atoms, R.sup.2 is a hydrocarbon group having 1-40 carbon atoms, a=0 to 1000, b=0 to 1000, c=0 to 1000, l=1 to 8, m=0 to 2, n=0 to 7, (l+m+n)=2 to 8, (al+bm+cn)=1 to 1000, m/(l+n).ltoreq.1/2.Type: GrantFiled: April 15, 1992Date of Patent: July 26, 1994Assignee: Nippon Oil & Fats Co., Ltd.Inventors: Taizo Igarashi, Susumu Honda, Tohru Yasukohchi, Show Onodera
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Patent number: 5320837Abstract: A controlled release preparation of an active material comprising a reaction product obtained by reacting (a) a copolymer consisting essentially of maleic anhydride and at least one polyalkylene glycol ether represented by formula (I): ##STR1## wherein B represents a residue of a compound having from 2 to 8 hydroxyl groups; R.sup.1 represents an alkenyl group having from 2 to 5 carbon atoms; AO represents an oxyalkylene group having from 2 to 18 carbon atoms or a combination thereof which may be linked together in blocks or at random; R.sup.2 represents a hydrocarbon group having from 1 to 24 carbon atoms; a represents a positive integer, b and c each represents 0 or a positive integer, and a+b+c=2 to 8; l.gtoreq.0, m.gtoreq.0, n.gtoreq.0, and l+m+n =1 to 1000; and (b) an active material. The preparation is soluble both in water and in an organic solvent and exhibits activity for a prolonged period of time.Type: GrantFiled: September 23, 1991Date of Patent: June 14, 1994Assignee: Nippon Oil and Fats Co., Ltd.Inventors: Shin-ichi Akimoto, Susumu Honda, Tohru Yasukohchi
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Patent number: 5250205Abstract: A lubricating oil comprising a copolymer of monomers comprising as essential ingredients a compound represented by formula (1) and one of maleic anhydride, maleic acid, a salt of maleic acid, and an ester of maleic acid ##STR1## where Z represents a residue of a compound having from 2 to 8 hydroxyl groups; AO represents one or more kinds of oxyalkylene groups each having from 2 to 18 carbon atoms, provided that in the case of two or more kinds of oxyalkylene groups, the oxyalkylene groups are linked to one another in either a block or a random arrangement; R represents an alkenyl group having from 2 to 5 carbon atoms; R.sup.1 represents a hydrocarbon or acyl group having from 1 to 24 carbon atoms; and a.gtoreq.0, b.gtoreq.0, c.gtoreq.0, l is a positive integer, and m and n independently are 0 or a positive integer, provided that l+m+n=2 to 8, n/(l+m).ltoreq.1/2, and al+bm+cn=1 to 1,000.Type: GrantFiled: December 4, 1991Date of Patent: October 5, 1993Assignee: Nippon Oil and Fats Co., Ltd.Inventors: Shin-ichi Akimoto, Tohru Yasukohchi, Kazuo Furuse, Shinya Okumura