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:
May. 26, 1998
Filed:
Jun. 27, 1997
Applicant:
Inventors:
Anthony J Martinez, Hamilton Square, NJ (US);
Richard B Greenwald, Somerset, NJ (US);
Assignee:
Enzon, Inc., Piscataway, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ; C08L / ;
U.S. Cl.
CPC ...
525403 ; 525408 ; 525409 ; 528300 ; 528302 ; 528310 ; 528322 ; 528332 ; 528361 ;
Abstract
The present invention is directed to methods of preparing high purity polyalkylene oxide carboxylic acids. The methods include reacting a polyalkylene oxide such as polyethylene glycol with a t-butyl haloacetate in the presence of a base followed by treatment with an acid such as trifloroacetic acid. The resultant polymer carboxylic acids are of sufficient plurty so that expensive and time consuming purification steps required for pharmaceutical grade polymers are avoided.
Martinez, Anthony. (1998). Method of preparing polyalkyene oxide carboxylic acids (U.S. Patent No. 5756593). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5756593
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile