IP Library › Granted Patent US 12,611,465
Granted Patent B2
US 12,611,465 · App. 19/079,771 · Granted Apr 28, 2026

Protein-enclosing polymeric micelle

Inventors: Horacio Cabral (Tokyo, JP); Anqi Tao (Tokyo, JP); Kazunori Igarashi (Tokyo, JP); Takuya Miyazaki (Tokyo, JP); George Lo Huang (Tokyo, JP); Pengwen Chen (Tokyo, JP)
Assignee: THE UNIVERSITY OF TOKYO
A61K47/6907A61K38/208A61K38/42A61K47/545A61K47/60
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Quick Facts
Patent No.
US 12,611,465
App. No.
19/079,771
Granted
Apr 28, 2026
Kind
B2
Abstract

The present invention provides a polymeric complex comprising a protein and a block copolymer represented by the following formula (1):

Claims (23)

1 . A block copolymer represented by the following formula (1):

wherein R 1 and R 2 each independently represent a hydrogen atom, or a linear or branched alkyl group containing 1 to 12 carbon atoms,

R 3 represents a group represented by the following formula (Ia) or (Ib):

L 1 represents a group represented by the following formula (11):

—(CH 2 ) p1 —NH—  (11),

wherein p1 represents an integer of 1 to 6,

m1 represents an integer of 0 to 500 and m2 represents an integer greater than 0 up to 500, provided that the sum of m1 and m2 represents an integer of 10 to 500,

m3, m4 and m5 each independently represent an integer of 1 to 5,

n represents an integer of 0 to 500, and

the symbol “/” means that (m1+m2) units of the respective monomer units shown on the left and right sides of this symbol may be in any sequence.

2 . The block copolymer according to claim 1 , wherein R 1 represents linear or branched alkyl group containing 1 to 12 carbon atoms.

3 . The block copolymer according to claim 1 , wherein R 1 represents alkyl group containing 1 carbon atom.

4 . The block copolymer according to claim 1 , wherein R 2 represents a hydrogen atom.

5 . The block copolymer according to claim 1 , wherein R 3 represents a group represented by the following formula (Ia):

6 . The block copolymer according to claim 1 , wherein R 3 represents a group represented by the following formula (Ib):

7 . The block copolymer according to claim 1 , wherein L 1 represents the following formula (11):

—(CH 2 ) p1 —NH—  (11),

wherein p1 represents an integer of 1 to 6.

8 . The block copolymer according to claim 7 , wherein p1 represents an integer of 1.

9 . The block copolymer according to claim 1 , wherein m3 represents an integer of 4.

10 . The block copolymer according to claim 1 , wherein m4 represents an integer of 4.

11 . The block copolymer according to claim 1 , wherein m5 represents an integer of 2.

12 . The block copolymer according to claim 1 , wherein the block copolymer is represented by the following formula (2):

Continuity (3)
Continuation 17623144
Provisional Application 62868040 · Jun 28, 2019
Related Publication 20250242047A1 · Jul 31, 2025
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