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:
Jul. 17, 2018
Filed:
Mar. 25, 2014
Nof Corporation, Tokyo, JP;
Takuma Tsubusaki, Kawasaki, JP;
Yuji Yamamoto, Kawasaki, JP;
NOF CORPORATION, Tokyo, JP;
Abstract
A hydrophilic polymer derivative having a benzylidene acetal linker whose hydrolysis rate at the pH of a weakly acidic environment in the living body can be accurately controlled. A hydrophilic polymer derivative having a benzylidene acetal linker, which is represented by the following formula (1): wherein Ris a hydrogen atom or a hydrocarbon group; R, R, R, R, and Rare each independently a hydrogen atom or a substituent and at least one of R, R, and Ris an electron-withdrawing substituent or at least one of Rand Rrepresents a substituent; Xis a chemically reactive functional group; P is a hydrophilic polymer; w is an integer of 1 to 8; and Zand Zare an independently selected divalent spacer.