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. 28, 2024
Filed:
Jan. 11, 2021
Hoffmann-la Roche Inc., Little Falls, NJ (US);
Roberto Falkenstein, Munich, DE;
Bernhard Spensberger, Eberfing, DE;
HOFFMANN-LA ROCHE INC, Little Falls, NJ (US);
Abstract
Herein is reported a method for the purification of a protein comprising erythropoietin and a single poly (ethylene glycol) residue from reaction by-products or not reacted starting material by a cation exchange chromatography method. It has been found that by employing a cation exchange Toyopearl® SP-650 chromatography material and employing a second wash step with an increased pH value compared to the first wash step a fusion protein of erythropoietin and a single poly (ethylene glycol) residue can be obtained in a single step with high purity and yield and suitability for large scale applications.