A method for retrieving excess pharmaceutical process fluid from the hold-up volume of a primary fluid filtration device. The hold-up volume is the volume of excess process fluid which accumulates in the bottom of the filter housing below the outlet opening thereof. Because it is considered valuable,...http://www.google.com/patents/US6168722?utm_source=gb-gplus-sharePatent US6168722 - Method for retrieving excess pharmaceutical process fluid from a filter
