Patents by Inventor Hiromitsu Kawata
Hiromitsu Kawata 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: 8470829Abstract: An imidazole derivative represented by formula (I): wherein Q is: A is hydrogen, halogen, or a substituted or unsubstituted C1-4 alkyl group; E is independently selected from a C1-6 alkyl group; R2 and R3 are independently selected from C1-6 alkyls; X1 and X2 are independently selected from O and S; Y is selected from a substituted or unsubstituted arylene group and a substituted or unsubstituted divalent 5- or 6-membered monocyclic or 8- to 10-membered condensed heterocyclic group; Z is —CON(—Ra)—, —CO—, —OOO—, —NRa—C(?NH)NRb—, —NRa—C(?N—CN)NRb—, —N(—Ra)COO—, —C(?NH)—, —SO2—, —SO2N(—Ra)—, —SO2NR1—, —N(—Ra)CO—, —N(—Ra)CON(—Rb)—, —N(COR1)CO—, —N(—Ra)SO2—, —N(SO2R1)SO2—, —N(—Ra)— or —N(—Ra)SO2N(—Rb)—; R1 is independently a hydrogen atom, a hydroxyl group, or substituted or unsubstituted group selected from C1-6 alkyl group, heterocyclic group, aryl group, C3-8 cycloalkyl group and C3-8 cycloalkenyl group; or salt or prodrug thereof.Type: GrantFiled: September 9, 2005Date of Patent: June 25, 2013Assignee: Chugai Seiyaku Kabushiki KaishaInventors: Kazutaka Tachibana, Haruhiko Sato, Masateru Ohta, Mitsuaki Nakamura, Takuya Shiraishi, Hitoshi Yoshino, Takashi Emura, Akie Honma, Etsuro Onuma, Hiromitsu Kawata, Kenji Taniguchi
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Publication number: 20110306615Abstract: According to the present invention, a compound represented by formula (I): wherein Q is: A is a hydrogen atom, a halogen atom, —ORa or a C1-4 alkyl group which may be substituted by one or more halogen atoms; E is independently selected from a C1-6 alkyl group; m is selected from integers from 0 to 3; R2 and R3 are independently selected from a C1-6 alkyl group; X1 and X2 are independently selected from O and S; Y is selected from an arylene group and a divalent 5- or 6-membered monocyclic or 8- to 10-membered condensed heterocyclic group, wherein the arylene group and the heterocyclic group may be substituted by 1 to 3 substituents independently selected from E1; E1 is independently selected from a hydroxyl group, a halogen atom, a C1-4 alkyl group, a cyano group, a C1-4 alkoky group, a carbamoyl group, a C1-4 alkylcarbamoyl group, a di(C1-4 alkyl)carbamoyl group, an amino group, a C1-4 alkylamino group, a di(C1-4 alkylamino group, a sulfamoyl group, a C1-4 alkylsulfamoyl group and a di(C1-4 alkyl)suType: ApplicationFiled: September 9, 2005Publication date: December 15, 2011Applicant: CHUGAI SEIYAKU KABUSHIKI KAISHAInventors: Kazutaka Tachibana, Haruhiko Sato, Masateru Ohta, Mitsuaki Nakamura, Takuya Shiraishi, Hitoshi Yoshino, Takashi Emura, Akie Honma, Etsuro Onuma, Hiromitsu Kawata, Kenji Taniguchi
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Patent number: 8022191Abstract: The present invention provides a polyethylene glycol-conjugated erythropoietin (PEG-conjugated EPO) prepared by PEG conjugation on the lysine residue at position 52 of native erythropoietin (native EPO). In order to achieve more sustained efficacy without losing physiological activities of native EPO, a glycoprotein rich in sugar chains, there has been a need to develop a PEG-conjugated EPO with significantly sustained efficacy by introducing a controlled number of PEG molecules at controlled positions. This PEG-conjugated EPO addresses such a need and provides more sustained efficacy.Type: GrantFiled: August 3, 2006Date of Patent: September 20, 2011Assignee: Chugai Seiyaku Kabushiki KaishaInventors: Teruo Nakamura, Yasuo Sekimori, Minoru Machida, Hiromitsu Kawata, Hajime Miyamoto
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Patent number: 7803826Abstract: The present invention provides a compound represented by formula (I): wherein n is an integer selected from 1 to 20, Q is A is cyano or the like; B is hydrogen, halogen, or the like; X1 and X2 are each independently selected from O and S; E is a C1-4 alkyl group; and R1, R2, R3 and R4 are each independently selected from a hydrogen atom and a C1-C6 alkyl group, and a drug, a pharmaceutical composition containing the compound, and the like.Type: GrantFiled: August 3, 2005Date of Patent: September 28, 2010Assignee: Chugai Seiyaku Kabushiki KaishaInventors: Kazutaka Tachibana, Haruhiko Sato, Masateru Ohta, Mitsuaki Nakamura, Takuya Shiraishi, Ikuhiro Imaoka, Hitoshi Yoshino, Masahiro Nagamuta, Hiromitsu Kawata
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Publication number: 20070249697Abstract: The present invention provides a compound represented by formula (I): wherein n is an integer selected from 1 to 20, Q is A is cyano or the like; B is hydrogen, halogen, or the like; X1 and X2 are each independently selected from O and S; E is a C1-4 alkyl group; and R1, R2, R3 and R4 are each independently selected from a hydrogen atom and a C1-C6 alkyl group, and a drug, a pharmaceutical composition containing the compound, and the like.Type: ApplicationFiled: August 3, 2005Publication date: October 25, 2007Inventors: Kazutaka Tachibana, Haruhiko Sato, Masateru Ohta, Mitsuaki Nakamura, Takuya Shiraishi, Ikuhiro Imaoka, Hitoshi Yoshino, Masahiro Nagamuta, Hiromitsu Kawata
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Patent number: 7271188Abstract: The present invention provides a compound represented by formula (I): [Formula 1] wherein n is an integer selected from 1 to 20, and R1 and R2, which may be the same or different, each represent a hydrogen atom, or a linear or branched C1-C6 alkyl group, or a salt, a prodrug or a solvate thereof, as well as a drug, a pharmaceutical composition containing the compound, and the like.Type: GrantFiled: June 11, 2004Date of Patent: September 18, 2007Assignee: Chugai Seikayu Kabushiki KaishaInventors: Kazutaka Tachibana, Haruhiko Sato, Masateru Ohta, Mitsuaki Nakamura, Takuya Shiraishi, Ikuhiro Imaoka, Hitoshi Yoshino, Masahiro Nagamuta, Hiromitsu Kawata
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Publication number: 20060276634Abstract: The present invention provides a polyethylene glycol-conjugated erythropoietin (PEG-conjugated EPO) prepared by PEG conjugation on the lysine residue at position 52 of native erythropoietin (native EPO). In order to achieve more sustained efficacy without losing physiological activities of native EPO, a glycoprotein rich in sugar chains, there has been a need to develop a PEG-conjugated EPO with significantly sustained efficacy by introducing a controlled number of PEG molecules at controlled positions. This PEG-conjugated EPO addresses such a need and provides more sustained efficacy.Type: ApplicationFiled: August 3, 2006Publication date: December 7, 2006Applicant: CHUGAI SEIYAKU KABUSHIKI KAISHAInventors: Teruo Nakamura, Yasuo Sekimori, Minoru Machida, Hiromitsu Kawata, Hajime Miyamoto
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Publication number: 20060135583Abstract: The present invention provides a compound represented by formula (I): wherein n is an integer selected from 1 to 20, and R1 and R2, which may be the same or different, each represent a hydrogen atom, or a linear or branched C1-C6 alkyl group, or a salt, a prodrug or a solvate thereof, as well as a drug, a pharmaceutical composition containing the compound, and the like.Type: ApplicationFiled: June 11, 2004Publication date: June 22, 2006Applicant: Chugai Seiyaku Kabushiki KaishaInventors: Kazutaka Tachibana, Haruhiko Sato, Masateru Ohta, Mitsuaki Nakamura, Takuya Shiraishi, Ikuhiro Imaoka, Hitoshi Yoshino, Masahiro Nagamuta, Hiromitsu Kawata
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Publication number: 20040082765Abstract: The present invention provides a polyethylene glycol-conjugated erythropoietin (PEG-conjugated EPO) prepared by PEG conjugation on the lysine residue at position 52 of native erythropoietin (native EPO). In order to achieve more sustained efficacy without losing physiological activities of native EPO, a glycoprotein rich in sugar chains, there has been a need to develop a PEG-conjugated EPO with significantly sustained efficacy by introducing a controlled number of PEG molecules at controlled positions. This PEG-conjugated EPO addresses such a need and provides more sustained efficacy.Type: ApplicationFiled: April 16, 2003Publication date: April 29, 2004Inventors: Teruo Nakamura, Yasuo Sekimori, Minoru Machida, Hiromitsu Kawata, Hajime Miyamoto