Issued Patents 2011
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7993532 | Method of filtration using cloth media and self-aligning backwash assembly | Lloyd W. Johnson, David Smith, Eugen O. Bergmann | 2011-08-09 |
| 7981290 | Backwash assembly having a rotating backwash arm for cleaning cloth filter media | David Smith | 2011-07-19 |
| 7951265 | Aqueous slurries of finely divided fillers, their preparation and their use for the production of filler-containing papers | Anton Esser, Volker Braig, Martin Wendker, Rainer Blum, Josef Neutzner +2 more | 2011-05-31 |
| 7892421 | Stationary cloth media filtration and self-aligning backwash assembly | Lloyd W. Johnson, David Smith, Eugen O. Bergmann | 2011-02-22 |
| 7871527 | Processes for water and wastewater treatment, including stationary cloth media filtration | David Smith, Paul Anthony Hughes, Lloyd W. Johnson | 2011-01-18 |