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:
Apr. 07, 2026
Filed:
Dec. 08, 2021
Applicant:
Nof Corporation, Tokyo, JP;
Inventors:
Assignee:
NOF CORPORATION, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08G 65/333 (2006.01); A61K 47/60 (2017.01);
U.S. Cl.
CPC ...
C08G 65/33337 (2013.01); A61K 47/60 (2017.08);
Abstract
A method for producing a maleimide polyethylene glycol derivative, may including a reaction step of heating a maleimide polyethylene glycol derivative having a protective group, in a solvent in the presence of silica gel to cause deprotection. A maleimide polyethylene glycol derivative can be produced at a high maleimidization rate while restraining deterioration of a maleimide group on deprotecting the maleimide polyethylene glycol derivative having a protective group.