Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5332474 | Conversion of pulp and paper mill waste solids to a papermaking filler product | — | 1994-07-26 |
| 5137599 | Conversion of pulp and paper mill sludge to papermaking pulp | — | 1992-08-11 |
| 5002633 | Conversion of pulp and paper mill waste solids to papermaking pulp | — | 1991-03-26 |
| 4983258 | Conversion of pulp and paper mill waste solids to papermaking pulp | — | 1991-01-08 |
| 4303516 | Orbital wastewater treatment system with integral clarification | H. David Stensel, Peter Maier, Mark G. Biesinger, David R. Refling, Ronald P. Klepper | 1981-12-01 |