| 8657268 |
Methods and apparatus for wastewater treatment |
Gregory P. Smiltneek, Martin M. Smiltneek, Robert B. Wheeler, Thomas E. Frankel, Arthur W. Phenicie +1 more |
2014-02-25 |
| 7718066 |
Method and apparatus for controlling wastewater treatment processes |
Thomas E. Jenkins, Timothy D. Hilgart, Juan De Dios Trillo Monsoriu, Ian Trillo Fox |
2010-05-18 |
| 7449113 |
Controlling wastewater treatment processes |
Thomas E. Jenkins, Timothy D. Hilgart, Juan De Dios Trillo Monsoriu, Ian Trillo Fox |
2008-11-11 |
| 6478964 |
Floating fine-bubble aeration system |
— |
2002-11-12 |
| 6475395 |
Liquid treatment process with in-plant pressure monitoring of submerged diffusers |
Frank L. Schmit, Lloyd Ewing |
2002-11-05 |
| 6200468 |
Aeration system apparatus with source of in situ cleaning agent and pressure monitoring connection for submerged diffuser |
Frank L. Schmit, Lloyd Ewing |
2001-03-13 |
| 5328601 |
Apparatus for in place gas cleaning of diffusion elements |
Frank Schmidt, Lloyd Ewing |
1994-07-12 |
| RE33177 |
In place gas cleaning of diffusion elements |
Frank L. Schmit, Lloyd Ewing |
1990-03-06 |
| 4889620 |
In place gas cleaning of diffusion elements |
Frank L. Schmit, Lloyd Ewing |
1989-12-26 |
| 4288394 |
Sewage aeration system |
Lloyd Ewing, Paul M. Thayer, Frank L. Schmit, William H. Roche |
1981-09-08 |
| 4288395 |
Diffusion element with boundary zone treatment |
Lloyd Ewing, William H. Roche |
1981-09-08 |
| 4261932 |
Diffusion element with boundary zone treatment |
Lloyd Ewing, William H. Roche |
1981-04-14 |
| 4261933 |
Diffusion element |
Lloyd Ewing |
1981-04-14 |