Patents by Inventor Shigeyuki Harada
Shigeyuki Harada 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: 20160168292Abstract: A copolymer includes the structure unit represented by the following Chemical formula 1 and the structure unit represented by the following Chemical formula 2, where R1 and R2 each, independently represent hydrogen atoms or methyl groups, and n represents a value in the range of from 1 to 90, where R3 represents a hydrogen atom or a methyl group and L represents an alkylene group having 2 to 18 carbon atoms.Type: ApplicationFiled: November 24, 2015Publication date: June 16, 2016Inventors: Masayuki FUKUOKA, Shigeyuki Harada, Yoshiki Yanagawa, Keita Katoh, Kazukiyo Nagai, Yuusuke Koizuka, Tomoyuki Shimada, Akiyoshi Sabu, Takuya Yamazaki, Akihiko Matsuyama
-
Patent number: 9365670Abstract: A copolymer includes structural units having the following formulae (1) and (2): wherein each of R1 and R2 independently represents a hydrogen atom or a methyl group; X represents a hydrogen atom or a cationic ion; and L represents a single bond or —(CH2)n—O—, the oxygen atom of which is bonded with the biphenyl; and n represents an integer of from 2 to 18.Type: GrantFiled: September 14, 2015Date of Patent: June 14, 2016Assignee: Ricoh Company, Ltd.Inventors: Shigeyuki Harada, Yoshiki Yanagawa, Keita Katoh, Masayuki Fukuoka, Kazukiyo Nagai, Yuusuke Koizuka, Tomoyuki Shimada, Akiyoshi Sabu
-
Patent number: 9353274Abstract: An ink includes water, a pigment, and a copolymer, wherein the copolymer contains a structure unit represented by the following Chemical formula 1, where R1 represents a hydrogen atom or a methyl group, M1+ and M2+ each, independently represent monovalent cations, n and m each, independently represent 0 or integers of from 1 to 6 excluding a case where both are 0 and a structure unit represented by the following Chemical formula 2, where R2 represents a hydrogen atom or a methyl group, Y represents an alkylene group having 2 to 18 carbon atoms.Type: GrantFiled: October 30, 2015Date of Patent: May 31, 2016Assignee: Ricoh Company, Ltd.Inventors: Keita Katoh, Shigeyuki Harada, Yoshiki Yanagawa, Masayuki Fukuoka, Kazukiyo Nagai, Tomoyuki Shimada, Akiyoshi Sabu, Yuusuke Koizuka
-
Publication number: 20160130452Abstract: An ink includes water, a pigment, and a copolymer, wherein the copolymer contains a structure unit represented by the following Chemical formula 1, where R1 represents a hydrogen atom or a methyl group, M1+ and M2+ each, independently represent monovalent cations, n and m each, independently represent 0 or integers of from 1 to 6 excluding a case where both are 0 and a structure unit represented by the following Chemical formula 2, where R2 represents a hydrogen atom or a methyl group, Y represents an alkylene group having 2 to 18 carbon atoms.Type: ApplicationFiled: October 30, 2015Publication date: May 12, 2016Inventors: Keita KATOH, Shigeyuki HARADA, Yoshiki YANAGAWA, Masayuki FUKUOKA, Kazukiyo NAGAI, Tomoyuki SHIMADA, Akiyoshi SABU, Yuusuke KOIZUKA
-
Patent number: 9321926Abstract: An ink for inkjet recording includes water; a hydrosoluble solvent; a pigment; and a copolymer including a phosphonic acid group. The copolymer including a phosphonic acid group includes structural units having the following formulae (1) and (2): wherein R1 represents a hydrogen atom or a methyl group; and M represents a hydrogen atom, an alkali metal or an organic ammonium; and wherein R2 represents a hydrogen atom or a methyl group; R3 represents an alkyl group having 1 to 4 carbon atoms; and each of n and m represents 0 or an integer of from 1 to 30, provided n+m is from 2 to 30.Type: GrantFiled: April 1, 2015Date of Patent: April 26, 2016Assignee: Ricoh Company, Ltd.Inventors: Keita Katoh, Shigeyuki Harada, Masayuki Fukuoka, Mitsuru Naruse, Masayasu Nonogaki, Akihiko Matsuyama, Kazukiyo Nagai, Yuusuke Koizuka
-
Publication number: 20160102162Abstract: A copolymer includes structural units having the following formulae (1) and (2): wherein each of R1 and R2 independently represents a hydrogen atom or a methyl group; X represents a hydrogen atom or a cationic ion; and L represents a single bond or —(CH2)n—O—, the oxygen atom of which is bonded with the biphenyl; and n represents an integer of from 2 to 18.Type: ApplicationFiled: September 14, 2015Publication date: April 14, 2016Inventors: Shigeyuki HARADA, Yoshiki YANAGAWA, Keita KATOH, Masayuki FUKUOKA, Kazukiyo NAGAI, Yuusuke KOIZUKA, Tomoyuki SHIMADA, Akiyoshi SABU
-
Publication number: 20160075892Abstract: A copolymer includes structural units having the following formulae (1) and (2): wherein R represents a hydrogen atom or a methyl group; X represents a hydrogen atom or a cationic ion; and each of L1 and L2 independently represents an alkylene group having 2 to 18 carbon atoms.Type: ApplicationFiled: August 31, 2015Publication date: March 17, 2016Inventors: Shigeyuki HARADA, Keita Katoh, Masayuki Fukuoka, Kazukiyo Nagai, Yuusuke Koizuka
-
Patent number: 9263682Abstract: A light emitting device is configured to include a substrate and a luminous layer provided overlying the substrate, which includes a semiconductor nanocrystal to which a carbazole derivative is coordination-bonded or attached, the carbazole derivative having aromatic rings of a compound represented by the chemical structure 1, which is substituted by one to three substitution groups: The one to three substitution groups are represented by the chemical structure 2: -X-Y-Z??Chemical Structure 2. X represents a methylene group, a carbonyloxy group, an oxycarbonyl group, a carbonyl group, an oxygen atom, and a sulfur atom, Y represents a substituted or non-substituted alkylene group, and Z represents a carboxyl group, a hydroxyl group, and a thiol group.Type: GrantFiled: August 2, 2011Date of Patent: February 16, 2016Assignee: RICOH COMPANY, LTD.Inventors: Shigeyuki Harada, Masaomi Sasaki, Mikiko Abe
-
Publication number: 20160032037Abstract: A copolymer contains a structure unit represented by Chemical formula 1 and a structure unit represented by Chemical formula 2, where R represents a hydrogen atom or a methyl group, X represents a hydrogen atom or a cation, L1 and L2 each, independently represent alkylene groups having 2 to 18 carbon atoms.Type: ApplicationFiled: July 8, 2015Publication date: February 4, 2016Inventors: Shigeyuki Harada, Keita Katoh, Masayuki Fukuoka, Kazukiyo Nagai, Yuusuke Koizuka
-
Publication number: 20160017075Abstract: A copolymer includes a structure unit represented by Chemical Formula I; and a structure unit represented by Chemical Formula II, where R1 and R2 each, independently represent hydrogen atoms or methyl groups, X represents a hydrogen atom or a cation, and L represents an alkylene group having 2 to 18 carbon atoms.Type: ApplicationFiled: July 15, 2015Publication date: January 21, 2016Inventors: Shigeyuki HARADA, Keita KATOH, Masayuki FUKUOKA, Kazukiyo NAGAI, Yuusuke KOIZUKA, Tomoyuki SHIMADA, Yoshiki YANAGAWA, Akiyoshi SABU, Akihiko MATSUYAMA, Takuya YAMAZAKI
-
Patent number: 9217089Abstract: An ink for inkjet recording includes water; a hydrosoluble solvent, a pigment, and a copolymer including a salt of a diphosphonic acid group. The copolymer including a salt of a diphosphonic acid group includes structural units having the following formulae (1) and (2): X represents an alkylene group having 1 to 3 carbon atoms, each of R1 and R2 represents a hydrogen atom or a methyl group, M+ represents an alkali metal ion, an organic ammonium ion or a proton and Z1 represents a hydrocarbon group having 6 to 22 carbon atoms. The alkali metal ion or the organic ammonium ion and the proton may be mixed, and half or more of the M+ are alkali metal ions or the organic ammonium ions.Type: GrantFiled: August 6, 2014Date of Patent: December 22, 2015Assignee: RICOH COMPANY, LTD.Inventors: Kazukiyo Nagai, Yuusuke Koizuka, Mitsuru Naruse, Masayasu Nonogaki, Akihiko Matsuyama, Keita Katoh, Shigeyuki Harada, Masayuki Fukuoka
-
Patent number: 9206202Abstract: A carbazole derivative represented by the following General Formula (1) where at least one aromatic ring has one to three substituents each represented by the following General Formula (2): in General Formula (1), Ar1 and Ar2 each independently represent a substituted or unsubstituted aryl group which may form a ring with a benzene ring, a substituted or unsubstituted heterocyclic group, a substituted or unsubstituted arylsilyl group, or a hydrogen atom, and Ar3 represents a substituted or unsubstituted aryl group, —X—Y—Z??(2) in General Formula (2), X represents a methylene group, a carbonyloxy group, an oxycarbonyl group, a carbonyl group, an oxygen atom or a sulfur atom, Y represents a substituted or unsubstituted alkylene group, and Z represents a carboxyl group, a hydroxyl group or a thiol group.Type: GrantFiled: March 29, 2012Date of Patent: December 8, 2015Assignee: Ricoh Company, Ltd.Inventors: Shigeyuki Harada, Masaomi Sasaki
-
Publication number: 20150291817Abstract: An ink for inkjet recording includes water; a hydrosoluble solvent; a pigment; and a copolymer including a phosphonic acid group. The copolymer including a phosphonic acid group includes structural units having the following formulae (1) and (2): wherein R1 represents a hydrogen atom or a methyl group; and M represents a hydrogen atom, an alkali metal or an organic ammonium; and wherein R2 represents a hydrogen atom or a methyl group; R3 represents an alkyl group having 1 to 4 carbon atoms; and each of n and m represents 0 or an integer of from 1 to 30, provided n+m is from 2 to 30.Type: ApplicationFiled: April 1, 2015Publication date: October 15, 2015Inventors: Keita KATOH, Shigeyuki HARADA, Masayuki FUKUOKA, Mitsuru NARUSE, Masayasu NONOGAKI, Akihiko MATSUYAMA, Kazukiyo NAGAI, Yuusuke KOIZUKA
-
Publication number: 20150252203Abstract: An ink composition contains a pigment, a polymer having a structure unit having a diphosphonic acid group, a hydrosoluble solvent, and water, and satisfies the following A and B. A: The pigment is represented by the following chemical formula 1a or chemical formula 1b. As for Chemical formula 1a, the pigment satisfies the relation 1: Y/X?0.800, where X and Y represent peak intensities at a Bragg (2?±0.2°) angle in a CuK? X-ray diffraction spectrum, when the pigment is represented by Chemical formula 1b, the pigment satisfies the relation 2: Y?/X??0.200, where X? and Y? represent peak intensities at a Bragg (2?±0.2°) angle in a CuK? X-ray diffraction spectrum, B. the structure unit having a diphosphonic acid group is represented by Chemical formula 2.Type: ApplicationFiled: February 18, 2015Publication date: September 10, 2015Applicant: RICOH COMPANY, LTD.Inventors: Akihiko Matsuyama, Shigeyuki Harada, Keita Katoh, Masayuki Fukuoka, Mitsuru Naruse, Kazukiyo Nagai, Yuusuke Koizuka, Masayasu Nonogaki
-
Patent number: 9117618Abstract: A discharge electrode 5 for generating ions and a high-voltage generating circuit unit 2 that supplies the discharge electrode 5 with a high voltage are housed in a housing 3. A discharge opening 12 for discharging the generated ions is formed in the housing 3. The housing 3 is covered by an exterior case 15. The exterior case 15 is connected to the high-voltage generating circuit unit 2 and functions as an induction electrode. A passage opening 33 leading to the discharge opening 12 is formed in the exterior case 15. An insulating sheet 36 covers the periphery of the passage opening 33 in the exterior case 15 facing a space into which the ions are discharged so that the discharged ions do not attach to the exterior case 15. Decrease in the amount of discharged ions can be prevented while using a peripheral component of the discharge electrode 5 as the induction electrode.Type: GrantFiled: March 21, 2013Date of Patent: August 25, 2015Assignee: Sharp Kabushiki KaishaInventors: Noriko Temporin, Shohgo Yukawa, Makoto Kitahira, Shigeyuki Harada
-
Patent number: 8998400Abstract: A copolymer contains repeating units represented by the following chemical formulae 1 and 2: In the chemical formulae 1 and 2, R represents a hydrogen atom or a cation; X represents an alkylene group having 2 to 18 carbon atoms; Y represents a single bond, an oxycarbonyl group [(X)—O—CO—(Z)], a carbonyloxy group [(X)—CO—O—(Z)], an ether group (—O—), or an imido group [(X)—N—CO—(—CO—)(Z)]; and Z represents a biphenyl group or a naphthyl group).Type: GrantFiled: January 14, 2014Date of Patent: April 7, 2015Assignee: Ricoh Company, Ltd.Inventors: Shigeyuki Harada, Tamotsu Aruga, Hiroshi Gotou, Hidetoshi Fujii
-
Publication number: 20150083931Abstract: A discharge electrode 5 for generating ions and a high-voltage generating circuit unit 2 that supplies the discharge electrode 5 with a high voltage are housed in a housing 3. A discharge opening 12 for discharging the generated ions is formed in the housing 3. The housing 3 is covered by an exterior case 15. The exterior case 15 is connected to the high-voltage generating circuit unit 2 and functions as an induction electrode. A passage opening 33 leading to the discharge opening 12 is formed in the exterior case 15. An insulating sheet 36 covers the periphery of the passage opening 33 in the exterior case 15 facing a space into which the ions are discharged so that the discharged ions do not attach to the exterior case 15. Decrease in the amount of discharged ions can be prevented while using a peripheral component of the discharge electrode 5 as the induction electrode.Type: ApplicationFiled: March 21, 2013Publication date: March 26, 2015Inventors: Noriko Temporin, Shohgo Yukawa, Makoto Kitahira, Shigeyuki Harada
-
Publication number: 20150056425Abstract: An ink for inkjet recording includes water; a hydrosoluble solvent, a pigment, and a copolymer including a salt of a diphosphonic acid group. The copolymer including a salt of a diphosphonic acid group includes structural units having the following formulae (1) and (2): X represents an alkylene group having 1 to 3 carbon atoms, each of R1 and R2 represents a hydrogen atom or a methyl group, M+ represents an alkali metal ion, an organic ammonium ion or a proton and Z1 represents a hydrocarbon group having 6 to 22 carbon atoms. The alkali metal ion or the organic ammonium ion and the proton may be mixed, and half or more of the M+ are alkali metal ions or the organic ammonium ions.Type: ApplicationFiled: August 6, 2014Publication date: February 26, 2015Applicant: RICOH COMPANY, LTD.Inventors: Kazukiyo Nagai, Yuusuke KOIZUKA, Mitsuru NARUSE, Masayasu NONOGAKI, Akihiko MATSUYAMA, Keita KATOH, Shigeyuki HARADA, Masayuki FUKUOKA
-
Publication number: 20140198160Abstract: A copolymer contains repeating units represented by the following chemical formulae 1 and 2: In the chemical formulae 1 and 2, R represents a hydrogen atom or a cation; X represents an alkylene group having 2 to 18 carbon atoms; Y represents a single bond, an oxycarbonyl group [(X)—O—CO—(Z)], a carbonyloxy group [(X)—CO—O—(Z)], an ether group (—O—), or an imido group [(X)—N—CO—(—CO—)(Z)]; and Z represents a biphenyl group or a naphthyl group).Type: ApplicationFiled: January 14, 2014Publication date: July 17, 2014Applicant: RICOH COMPANY, LTD.Inventors: Shigeyuki Harada, Tamotsu ARUGA, Hiroshi GOTOU, Hidetoshi FUJII
-
Patent number: 8765903Abstract: A carbazole polymer containing a repeating unit represented by a chemical structure 1: where R represents an aliphatic or alicyclic bifunctional group, Ar represents an aromatic hydrocarbon or heterocyclic ring bifunctional group, and Ar1 represents an aromatic hydrocarbon or heterocyclic ring monofunctional group.Type: GrantFiled: September 7, 2011Date of Patent: July 1, 2014Assignee: Ricoh Company, Ltd.Inventors: Masaomi Sasaki, Shigeyuki Harada, Takashi Okada, Toshiya Sagisaka