Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6113664 | Flange densification for filter candles | James F. Zievers, Elizabeth C. Zievers | 2000-09-05 |
| 5766290 | Cross flow filter design | James F. Zievers, Elizabeth C. Zievers | 1998-06-16 |
| 5500029 | Filter element and method of manufacture | James F. Zievers, Elizabeth C. Zievers, Peter Aguilar | 1996-03-19 |
| 5328492 | Filtration apparatus | James F. Zievers, Peter Aguilar | 1994-07-12 |
| 5256175 | Hot gas filter | James F. Zievers, Elizabeth C. Zievers | 1993-10-26 |
| 5238478 | Ceramic filter element and method of manufacture | James F. Zievers, Elizabeth C. Zievers | 1993-08-24 |
| 5209844 | Hot gas filter with jet pulse cleaning | James F. Zievers, Elizabeth C. Zievers, Peter Aguilar | 1993-05-11 |
| 5152815 | Type 114 tiered filter | James F. Zievers, Elmer Kulousek | 1992-10-06 |
| 5071457 | Composite for filtering hot gas and method of its manufacture | Henry Schmidt, Jr., James F. Zievers | 1991-12-10 |
| 5037461 | Filtration apparatus | James F. Zievers, Elmer Kulousek | 1991-08-06 |
| 4909813 | Jet pulse extender | — | 1990-03-20 |
| 4865629 | Control of particle size distribution in gas filtration | James F. Zievers | 1989-09-12 |
| 4725356 | Tubular pressure filter | James F. Zievers | 1988-02-16 |
| 4713174 | Mounting arrangement for a tube-type filter element | James F. Zievers | 1987-12-15 |
| 4664752 | Desalination system | James F. Zievers | 1987-05-12 |
| 4452707 | Process for manufacturing a filter aid | James F. Zievers | 1984-06-05 |