Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 5641401 | Sludge deodorization | Danford L. Bice | 1997-06-24 | $26,772,000 |
| 5635077 | Ammonia removal | Danford L. Bice | 1997-06-03 | $18,664,000 |
| 5580102 | Pipe support and pipeline therewith | — | 1996-12-03 | $8,374,000 |
| 5540847 | Sludge digestion | Danford L. Bice | 1996-07-30 | |
| 5527984 | Waste gas incineration | Danford L. Bice | 1996-06-18 | $8,038,000 |
| 5457919 | Sludge clarifier bottom | Hershel R. Rabren | 1995-10-17 | $11,953,000 |
| 5453179 | Sludge clarifier roof with central column support | — | 1995-09-26 | $11,593,000 |
| 5360143 | Lined hopper for storing solids | — | 1994-11-01 | $9,837,000 |
| 5349797 | Joint liquid stop | — | 1994-09-27 | $13,034,000 |
| 5340164 | Pipe to concrete transition | — | 1994-08-23 | $7,621,000 |
| 4476069 | Liquid distributing apparatus for a liquid-vapor contact column | Stephen Harper | 1984-10-09 | $9,758,000 |
| 4432913 | Liquid distributing apparatus and method for a liquid-vapor contact column | Stephen Harper | 1984-02-21 | $3,333,000 |