Method for Reducing Host Cell Proteins in Affinity Chromatography

This document is a USPTO patent application (US20260085090A1) filed by Genentech, Inc. on December 2, 2025. It describes a method for purifying antibodies by reducing host cell proteins through a wash step with a low conductivity aqueous solution during affinity chromatography. The application lists specific inventors and CPC classifications related to peptide and antibody purification.

While this is a patent application and not a regulatory rule, it signifies a new development in biopharmaceutical manufacturing processes. Companies involved in antibody production or purification may find this method relevant for improving product purity and yield. Compliance officers in the pharmaceutical sector should be aware of such innovations as they can influence future manufacturing standards and intellectual property landscapes.