Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10913014 | Multiple rate filter underdrain lateral gas metering plate | John L. Geibel, Ivan Zhu | 2021-02-09 |
| 10881989 | Self-cleaning, groutless, filter underdrain | Scott R. Cable, John L. Geibel, Robert J. Green, Howard J. Sweeney, Robert Lee Wiley, Jr. | 2021-01-05 |
| 10112128 | Apparatus for securing underdrain filter block | Christopher J. Ball, Daniel E. Bruce | 2018-10-30 |
| 10052572 | Underdrain filter block | Daniel E. Bruce, Christopher J. Ball | 2018-08-21 |
| 10022654 | Gas-liquid distribution technique for water or wastewater filters using underdrains | Brian J. Bates, Robert J. Green | 2018-07-17 |
| 9072990 | Apparatus for securing underdrain filter block | Daniel E. Bruce, Christopher J. Ball | 2015-07-07 |
| 8889003 | Underdrain filter block including a grout chamber | Daniel E. Bruce, Christopher J. Ball | 2014-11-18 |
| 8323514 | Method and system for cleaning filter media support structures | John L. Geibel, Eugene M. Vegso, Christopher J. Ball, Robert L. Laird, Thomas M. Getting | 2012-12-04 |
| 5108627 | Filter underdrain block | Gerald D. Wolfe | 1992-04-28 |