IP Library › Granted Patent US 8,992,902
Granted Patent B2
US 8,992,902 · App. 14/283,788 · Granted Mar 31, 2015

N-maleimidyl polymer derivatives

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Quick Facts
Patent No.
US 8,992,902
App. No.
14/283,788
Granted
Mar 31, 2015
Kind
B2
Abstract

The invention is directed to multi-functional N-maleimidyl polymer derivatives comprising a water soluble and non-peptidic polymer backbone having a terminal carbon, such as a poly(alkylene glycol), the terminal carbon of the polymer backbone being directly bonded to the nitrogen atom of a N-maleimidyl moiety without a linking group therebetween. The invention also provides two methods of preparing such linkerless N-maleimidyl polymer derivatives.

Claims (4)

1. A multi-functional N-maleimidyl polymer derivative having the formula:

wherein:

X is amine; and

n is about 20 to about 4000.

Assignments (4)
RELEASE OF SECURITY INTEREST Recorded Apr 17, 2020
From: TC LENDING, LLC, AS COLLATERAL AGENT
To: NEKTAR THERAPEUTICS
Reel/Frame 053180/0009 →
RELEASE OF SECURITY INTEREST RECORDED AT REEL 33105, FRAME 0898 Recorded Oct 14, 2015
From: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS COLLATERAL AGENT
To: NEKTAR THERAPEUTICS
Reel/Frame 036855/0524 →
GRANT OF SECURITY INTEREST IN UNITED STATES PATENTS Recorded Oct 6, 2015
From: NEKTAR THERAPEUTICS
To: TC LENDING, LLC, AS COLLATERAL AGENT
Reel/Frame 036796/0562 →
SECURITY INTEREST Recorded Jun 9, 2014
From: NEKTAR THERAPEUTICS
To: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS COLLATERAL AGENT
Reel/Frame 033105/0898 →