Last Updated: September 24, 2026

Patent: 10,723,775

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Summary for Patent: 10,723,775

Title:	Method for purifying darbepoetin alfa
Abstract:	The present invention relates to a method for purifying darbepoetin alfa by selectively separating only a structural isoform having a high content of sialic acid from a mixture of structural isoforms of darbepoetin alfa having various contents of sialic acid. Since the method of the present invention is a novel method for purifying darbepoetin alfa which can be conveniently and simply produced, it is possible to remarkably increase productivity due to process efficiency improvement, as well as to yield high purity darbepoetin alfa when mass-producing darbepoetin alfa according to the present invention.
Inventor(s):	Lee; Yoon Jung (Yongin-si, KR), Kim; Kyung Hwa (Busan, KR), Yang; Yoo Hee (Yongin-si, KR), Yoo; Jung Min (Seoul, KR), Kim; Se Jun (Gwacheon-si, KR), Moon; Ji Hyun (Seoul, KR), Oh; Hoo Keun (Suwon-si, KR), Lee; Dong Eok (Seoul, KR), Lee; Won Jeong (Seoul, KR), Lee; Jung Rok (Busan, KR), Lee; Chung Min (Yongin-si, KR), Choi; Eun Young (Seoul, KR), Ha; Gyong Sik (Suwon-si, KR)
Assignee:	CJ Healthcare Corporation (Seoul, KR)
Application Number:	15/039,569
Patent Claims:	see list of patent claims

Details for Patent 10,723,775

Glossary

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Applicant	Tradename	Biologic Ingredient	Dosage Form	BLA	Approval Date	Patent No.	Expiredate
Amgen Inc.	ARANESP	darbepoetin alpha	Injection	103951	17-Sep-01	10,723,775	2034-11-28
Amgen Inc.	ARANESP	darbepoetin alpha	Injection	103951	19-Jul-02	10,723,775	2034-11-28
Amgen Inc.	ARANESP	darbepoetin alpha	Injection	103951	17-Dec-02	10,723,775	2034-11-28
Amgen Inc.	ARANESP	darbepoetin alpha	Injection	103951	12-Dec-03	10,723,775	2034-11-28
Amgen Inc.	ARANESP	darbepoetin alpha	Injection	103951	29-Jun-06	10,723,775	2034-11-28
Amgen Inc.	ARANESP	darbepoetin alpha	Injection	103951		10,723,775	2034-11-28
>Applicant	>Tradename	>Biologic Ingredient	>Dosage Form	>BLA	>Approval Date	>Patent No.	>Expiredate

International Patent Family for US Patent 10,723,775

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Country	Patent Number	Estimated Expiration
Brazil	112016009421	⤷ Start Trial
China	105764915	⤷ Start Trial
European Patent Office	3075740	⤷ Start Trial
Hong Kong	1223633	⤷ Start Trial
Japan	2016538261	⤷ Start Trial
Japan	6232130	⤷ Start Trial
>Country	>Patent Number	>Estimated Expiration

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