The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 29, 2023
Filed:
Dec. 01, 2018
Applicant:
Beijing Hanmi Pharmaceutical Co., Ltd., Beijing, CN;
Inventors:
Jiawang Liu, Beijing, CN;
Yaping Yang, Beijing, CN;
Nanmeng Song, Beijing, CN;
Maengsup Kim, Beijing, CN;
Assignee:
Beijing Hanmi Pharmaceutical Co., Ltd., Beijing, CN;
Primary Examiner:
Int. Cl.
CPC ...
C07K 16/28 (2006.01); C07K 16/46 (2006.01); A61K 39/00 (2006.01);
U.S. Cl.
CPC ...
C07K 16/2827 (2013.01); C07K 16/468 (2013.01); A61K 2039/505 (2013.01); C07K 2317/31 (2013.01); C07K 2317/55 (2013.01); C07K 2317/569 (2013.01); C07K 2317/622 (2013.01);
Abstract
Provided are an anti-PD-L1/anti-CD47 bispecific antibody that has natural IgG characteristics and is in a highly stable heterodimer form without the heavy chain and light chain being mismatched, and a preparation method therefor. Either the first Fc chain or second Fc chain of the bispecific antibody comprises amino acid substitutions at positions 366 and 399, and the other comprises amino acid substitutions at positions 351, 407 and 409.