Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8425814 | Method for preparing hydrophilic polyethersulfone membrane | Michael Mezhirov, Eshan B. Yeh | 2013-04-23 |
| 7645312 | Pleated multi-layer filter media and cartridge | Thomas J. Hamlin, Gokhan Kuruc, Peter J. Leavesley | 2010-01-12 |
| 7537718 | Hydrophilic polyethersulfone membrane and method for preparing same | Michael Mezhirov, Eshan B. Yeh | 2009-05-26 |
| 6994789 | Pre-metered, unsupported multilayer microporous membrane | Eugene A. Ostreicher | 2006-02-07 |
| 6736971 | Pre-metered, unsupported multilayer microporous membrane | Eugene A. Ostreicher | 2004-05-18 |
| 6733677 | Filter sheet and process for purifying photoresist composition employing the filter sheet | Kenneth C. Hou, Eugene A. Ostreicher | 2004-05-11 |
| 6706184 | Unsupported multizone microporous membrane | Eugene A. Ostreicher | 2004-03-16 |
| 6576139 | Process for purifying photoresist composition employing a filter sheet | Kenneth C. Hou, Eugene A. Ostreicher | 2003-06-10 |
| 6391200 | Filter and method of filtering a fluid | John L. Pulek, Thomas J. Hamlin, C. Paul | 2002-05-21 |
| 6258409 | Method for sealing the perimeter of a filter sheet | Mark W. Schimmel, Richard A. Prince, Norbert Roessler | 2001-07-10 |
| 6132608 | Optimized wax for sealing the edge of a filter sheet | Mark W. Schimmel, Richard A. Prince, Norbert Roessler | 2000-10-17 |
| 6103122 | Filter sheet for purifying photoresist composition | Kenneth C. Hou, Eugene A. Ostreicher | 2000-08-15 |