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:
Aug. 02, 2011
Filed:
Jan. 10, 2006
Applicants:
Hong Zhao, Edison, NJ (US);
Anthony J. Martinez, Hamilton Square State, NJ (US);
Inventors:
Hong Zhao, Edison, NJ (US);
Anthony J. Martinez, Hamilton Square State, NJ (US);
Assignee:
Enzon Pharmaceuticals, Inc., Bridgewater, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61K 47/12 (2006.01); C08G 65/332 (2006.01); C08L 71/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A new method of preparing a tertiary alkyl ester of a polyalkylene oxide is provided. The new method employs milder conditions that avoid the back reaction to the starting polyalkylene oxide. The tertiary alkyl ester of a polyalkylene oxide is then reacted with a suitable acid to produce a polyalkylene oxide acid.