Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5919424 | Method of recovering minerals from papermaking sludge and sludge-derived ash | George P. Philippidis, Yiannis A. Monovoukas | 1999-07-06 |
| 5876505 | Method of producing glucose from papermaking sludge using concentrated or dilute acid hydrolysis | George P. Philippidis, Alan M. James, Yiannis A. Monovoukas | 1999-03-02 |
| 5777086 | Method of recovering lignin from pulp and paper sludge | George P. Philippidis, Yiannis A. Monovoukas | 1998-07-07 |