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. 10, 1999
Filed:
Sep. 18, 1997
Applicant:
Inventor:
James Ervin Seely, Louisville, CO (US);
Assignee:
Amgen Inc., Thousand Oaks, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
A61K / ; B01D / ; C08G / ;
U.S. Cl.
CPC ...
424 7827 ; 424 7808 ; 210635 ; 210656 ; 530351 ;
Abstract
The present invention relates to a process for purifying polyethylene glycols (PEGs) which utilizes hydrophobic interaction chromatography (HIC) to separate the PEGs based on their size and on their end-group functionality. The purified PEGs can be used to modify biologically active molecules and improve overall production of such molecules.