Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8281543 | Systems and methods for ballasting covers for gas-holding sludge digestors | Steven R. Hough, Jeffrey L. Wight | 2012-10-09 |
| 5720891 | Retractable sediment collecting device for covered basins | Michael J. Graham, Brad Hansen, Marty L. Stout, Jeremy G. Scott | 1998-02-24 |
| 5423895 | Sludge digesters with separate liquid chambers to buoy ballast members | Jeffrey L. Wight, David P. Brown | 1995-06-13 |
| 5238844 | Sludge digester | Jeffrey L. Wight | 1993-08-24 |
| 5092482 | Sludge digesters with separate liquid chambers to buoy ballast members | Jeffrey L. Wight | 1992-03-03 |
| 4541210 | Multiple rise cover | — | 1985-09-17 |
| 4391705 | Ballasting digestor covers | David P. Brown | 1983-07-05 |
| 4378437 | Digester apparatus | — | 1983-03-29 |