Patents by Inventor Yoshimi Ishibashi
Yoshimi Ishibashi 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: 20240109359Abstract: The purpose of the present disclosure is to improve the sensitivity of 4,4?-dihydroxydiphenylsulfone, which is a developer, in a heat-sensitive recording material. The present disclosure provides a heat-sensitive recording material that uses at least one selected from 1,2-bis(phenoxy)ethane, 1,2-bis(3-methylphenoxy)ethane, benzyloxynaphthalene, and oxalic acid di-p-methylbenzyl ester as a sensitizer for 4,4?-dihydroxydiphenylsulfone, and further includes benzoin as a sensitization aid.Type: ApplicationFiled: June 11, 2020Publication date: April 4, 2024Inventors: Yoshimi ISHIBASHI, Takamichi OISHI, Yoshitaka FUJINO, Ryoichi KINISHI
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Patent number: 11945769Abstract: The present invention relates to an N,N?-diurea derivative represented by the following general formula (1) and a method for producing the same. In addition, the present invention relates to a thermosensitive recording material in which a thermosensitive recording layer including a basic dye which is colorless or lightly colored at room temperature and a developer capable of developing color upon contact with the basic dye by heating is provided on a base sheet, wherein the developer is the N,N?-diurea derivative represented by the following general formula (1): (wherein R2 is an alkyl group, an aralkyl group, or an aryl group; and A1 is a hydrogen atom or an alkyl group).Type: GrantFiled: August 10, 2018Date of Patent: April 2, 2024Assignee: SANKO CO., LTD.Inventors: Ryoichi Kinishi, Yoshimi Ishibashi
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Publication number: 20210340099Abstract: The present invention relates to an N,N?-diurea derivative represented by the following general formula (1) and a method for producing the same. In addition, the present invention relates to a thermosensitive recording material in which a thermosensitive recording layer including a basic dye which is colorless or lightly colored at room temperature and a developer capable of developing color upon contact with the basic dye by heating is provided on a base sheet, wherein the developer is the N,N?-diurea derivative represented by the following general formula (1): (wherein R2 is an alkyl group, an aralkyl group, or an aryl group; and A1 is a hydrogen atom or an alkyl group).Type: ApplicationFiled: August 10, 2018Publication date: November 4, 2021Inventors: Ryoichi KINISHI, Yoshimi ISHIBASHI
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Patent number: 10086634Abstract: A heat-sensitive recording material includes a heat-sensitive recording layer containing a basic dye and a developer and provided on a supporting body, in which the developer is at least one type of an N-substituted amino acid derivative represented by the following General Formula: (R—X)m—Y—(Z)m . . . (1) (In Formula (1), R represents an alkyl group or an aryl group which may have a substituent. X is a group bonded to the N-terminus of Y, and represents —OCO—, —SO2NHCO—, —NHCO—, —NHCS—, or —SO2—. Y represents an amino acid residue or a peptide residue. Z represents a group bonded to the C-terminus of Y and represents an OH group or an OR? group. When Y is an amino acid residue other than a cystine residue or when Y is a peptide residue not having a cystine residue, m=1, and when Y is a peptide residue having n cystine residues, m=n+1 and n is 1 or 2.Type: GrantFiled: September 13, 2016Date of Patent: October 2, 2018Assignee: SANKO CO., LTD.Inventors: Yoshimi Ishibashi, Ryoichi Kinishi, Yoshito Nakagawa
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Publication number: 20180194151Abstract: A heat-sensitive recording material includes a heat-sensitive recording layer containing a basic dye and a developer and provided on a supporting body, in which the developer is at least one type of an N-substituted amino acid derivative represented by the following General Formula: (R—X)m—Y—(Z)m??(1) (In Formula (1), R represents an alkyl group or an aryl group which may have a substituent. X is a group bonded to the N-terminus of Y, and represents —OCO—, —SO2NHCO—, —NHCO—, —NHCS—, or —SO2—. Y represents an amino acid residue or a peptide residue. Z represents a group bonded to the C-terminus of Y and represents an OH group or an OR? group. When Y is an amino acid residue other than a cystine residue or when Y is a peptide residue not having a cystine residue, m=1, and when Y is a peptide residue having n cystine residues, m=n+1 and n is 1 or 2.Type: ApplicationFiled: September 13, 2016Publication date: July 12, 2018Inventors: Yoshimi Ishibashi, Ryoichi Kinishi, Yoshito Nakagawa
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Patent number: 7956007Abstract: A heat-sensitive recording material comprising a support and a heat-sensitive recording layer, the heat-sensitive recording layer comprising a colorless or pale-colored basic dye and a developer, the developer being 4-allyloxy-4?-hydroxydiphenylsulfone, and the heat-sensitive recording layer further comprising a compound represented by formula (I): wherein R1 is an unsubstituted aromatic group, or an aromatic group substituted with at least one member selected from the group consisting of a methyl group and a chlorine atom, and R2 is a divalent organic group.Type: GrantFiled: January 24, 2006Date of Patent: June 7, 2011Assignee: Oji Paper Co., Ltd.Inventors: Yoshimi Ishibashi, Yukie Mori
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Patent number: 7674748Abstract: (1) A 4-hydroxy-4?-isopropoxydiphenylsulfone developer dispersion characterized by being obtained by wet grinding a 4-hydroxy-4?-isopropoxydiphenylsulfone developer in the presence of at least one compound selected from the group consisting of 1,1,3-tris(2-methyl-4-hydroxy-5-cyclohexylphenyl)butane and 1,1,3-tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane, or in the presence of 1,3,5-tris(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)isocyanuric acid; (2) a method for wet grinding a 4-hydroxy-4?-isopropoxydiphenylsulfone developer, characterized by wet grinding a 4-hydroxy-4?-isopropoxydiphenylsulfone developer in the presence of at least one compound selected from the group consisting of 1,1,3-tris(2-methyl-4-hydroxy-5-cyclohexylphenyl)butane and 1,1,3-tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane, or in the presence of 1,3,5-tris(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)isocyanuric acid; and (3) a heat-sensitive recording material having a heat-sensitive recording layer containing the developer dispersioType: GrantFiled: March 15, 2005Date of Patent: March 9, 2010Assignee: OJI Paper Co., Ltd.Inventor: Yoshimi Ishibashi
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Publication number: 20080167184Abstract: A heat-sensitive recording material comprising a support and a heat-sensitive recording layer, the heat-sensitive recording layer comprising a colorless or pale-colored basic dye and a developer, the developer being 4-allyloxy-4?-hydroxydiphenylsulfone, and the heat-sensitive recording layer further comprising a compound represented by formula (I): wherein R1 is an unsubstituted aromatic group, or an aromatic group substituted with at least one member selected from the group consisting of a methyl group and a chlorine atom, and R2 is a divalent organic group.Type: ApplicationFiled: January 24, 2006Publication date: July 10, 2008Applicant: OJI Paper Co., Ltd.Inventors: Yoshimi Ishibashi, Mori Yukie
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Publication number: 20070191226Abstract: (1) A 4-hydroxy-4?-isopropoxydiphenylsulfone developer dispersion characterized by being obtained by wet grinding a 4-hydroxy-4?-isopropoxydiphenylsulfone developer in the presence of at least one compound selected from the group consisting of 1,1,3-tris(2-methyl-4-hydroxy-5-cyclohexylphenyl)butane and 1,1,3-tris (2-methyl-4-hydroxy-5-tert-butylphenyl) butane, or in the presence of 1,3,5-tris(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)isocyanuric acid; (2) a method for wet grinding a 4-hydroxy-4?-isopropoxydiphenylsulfone developer, characterized by wet grinding a 4-hydroxy-4?-isopropoxydiphenylsulfone developer in the presence of at least one compound selected from the group consisting of 1,1,3-tris(2-methyl-4-hydroxy-5-cyclohexylphenyl)butane and 1,1,3-tris (2-methyl-4-hydroxy-5-tert-butylphenyl) butane, or in the presence of 1,3,5-tris(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)isocyanuric acid; and (3) a heat-sensitive recording material having a heat-sensitive recording layer containing the developer dispeType: ApplicationFiled: March 15, 2005Publication date: August 16, 2007Applicant: OJI PAPER CO., LTD.Inventor: Yoshimi Ishibashi
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Patent number: 6861388Abstract: Disclosed are a paper support as well as a recording paper comprising the paper support and as formed thereon a recording layer, particularly a heat-sensitive recording layer, a transfer receiving layer for thermal fusion transfer recording or sublimation transfer recording or an ink receiving layer for ink-jet recording, the paper support having a security element embedded therein, the security element being a thread-shpaed or ribbon-shaped security element, and the paper support having a thickness which is at least 3 times the diameter of the thread-shaped security element or at least 3 times the thickness of the ribbon-shaped security element.Type: GrantFiled: July 10, 2001Date of Patent: March 1, 2005Assignee: OJI Paper Co., Ltd.Inventors: Yoshimi Ishibashi, Masanori Ohhashi, Hiroshi Ito
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Publication number: 20020025418Abstract: Disclosed are a paper support as well as a recording paper comprising the paper support and as formed thereon a recording layer, particularly a heat-sensitive recording layer, a transfer receiving layer for thermal fusion transfer recording or sublimation transfer recording or an ink receiving layer for ink-jet recording, the paper support having a security element embedded therein, the security element being a thread-shpaed or ribbon-shaped security element, and the paper support having a thickness which is at least 3 times the diameter of the thread-shaped security element or at least 3 times the thickness of the ribbon-shaped security element.Type: ApplicationFiled: July 10, 2001Publication date: February 28, 2002Inventors: Yoshimi Ishibashi, Masanori Ohhashi, Hiroshi Ito