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:
Dec. 20, 2022
Filed:
May. 28, 2020
Applicant:
Nof Corporation, Tokyo, JP;
Inventors:
Takuma Tsubusaki, Kawasaki, JP;
Yuji Yamamoto, Kawasaki, JP;
Assignee:
NOF CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61K 47/60 (2017.01); C08G 65/333 (2006.01);
U.S. Cl.
CPC ...
A61K 47/60 (2017.08); C08G 65/333 (2013.01); C08G 65/33337 (2013.01); C08G 65/33341 (2013.01);
Abstract
A biodegradable polyethylene glycol derivative in which a polyethylene glycol chain is linked by an acetal linker capable of accurately controlling the hydrolysis rate under different pH environments in the living body, and whose division rate into a polyethylene glycol chain of low molecular weight in the living body can be accurately controlled. The biodegradable polyethylene glycol derivative is represented by formula (1) or formula (2) as described.