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:
Oct. 16, 2018
Filed:
Mar. 21, 2012
Wolfgang Demmer, Goettingen, DE;
Louis Villain, Hannover, DE;
Hans-heinrich Hoerl, Bovenden, DE;
SARTORIUS STEDIM BIOTECH GMBH, Goettingen, DE;
Abstract
The present invention relates to a process for the separation of a mixture of a protein and its reaction product with a polyalkylene glycol, comprising the steps: a) providing a mixture comprising the protein and the reaction product in a fluid, b) bringing the mixture of step a) into contact with a microporous cellulose acetate membrane with adsorption of the reaction product onto the cellulose acetate membrane, the protein not becoming adsorbed onto the cellulose acetate membrane, c) removal of the protein from the cellulose acetate membrane, and d) desorbing the reaction product from the cellulose acetate membrane, the reaction product being selected from the group comprising the protein which is mono- or polyfunctionalized by the polyalkylene glycol, or mixtures thereof.