Envirex, Inc.
63Patents
0Active
63Granted
37Portfolio score
Filing activity: May 6, 1974 → Jun 3, 1996
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4961854A | Activated sludge wastewater treatment process | Emerging Cross-Sectional Technologies | 41 | Expired |
| US4975197A | Orbal wastewater treatment process | Emerging Cross-Sectional Technologies | 41 | Expired |
| US5766484A | Dissolved gas floatation device | Performing Operations; Transporting | 38 | Expired |
| US4568457A | Staged anaerobic reactor | Emerging Cross-Sectional Technologies | 36 | Expired |
| US5326459A | Wastewater treatment apparatus | Emerging Cross-Sectional Technologies | 33 | Expired |
| US4668387A | Deep submergence rotating biological contactor apparatus | Emerging Cross-Sectional Technologies | 30 | Expired |
| US4038187A | Microscreen drum | Performing Operations; Transporting | 29 | Expired |
| US5326460A | Pretensioned mesh insert and method for producing a pretensioned mesh insert | Emerging Cross-Sectional Technologies | 27 | Expired |
| US4932927A | High strength, non-metallic transmission chain | Performing Operations; Transporting | 27 | Expired |
| US3953555A | Diffuser connector for aeration header | Emerging Cross-Sectional Technologies | 26 | Expired |
| US4582601A | Polymeric basket frame for a traveling water screen | Performing Operations; Transporting | 25 | Expired |
| US4863418A | Non-metallic chain including wound composite chain links and molded pins | Mechanical Engineering; Lighting; Heating | 24 | Expired |
| US4663042A | Polymeric sludge collector flight | Performing Operations; Transporting | 22 | Expired |
| US5372712A | Biomass growth control apparatus for fluid bed biological reactor | Emerging Cross-Sectional Technologies | 22 | Expired |
| US4555340A | Excess overflow orifice tubes | Emerging Cross-Sectional Technologies | 21 | Expired |
| US5242583A | Wire screen clamp | Emerging Cross-Sectional Technologies | 21 | Expired |
| US4950398A | Cantilevered flight attachment for non-metallic chain | Performing Operations; Transporting | 20 | Expired |
| US4280913A | Water purification process | Performing Operations; Transporting | 20 | Expired |
| US4563282A | Wastewater treatment plant and method | Emerging Cross-Sectional Technologies | 19 | Expired |
| US4631974A | Polymeric split sprocket wheel | Emerging Cross-Sectional Technologies | 19 | Expired |
| US4604206A | Staged anaerobic reactor | Emerging Cross-Sectional Technologies | 17 | Expired |
| US4038185A | Scum control system for peripheral feed channel of sedimentation tank | Performing Operations; Transporting | 16 | Expired |
| US4549962A | Rotating biological contactor | Emerging Cross-Sectional Technologies | 16 | Expired |
| US5035681A | Reduced friction sprocket assembly for use in corrosive environments | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US5215616A | Method for manufacturing a high strength, non-metallic transmission chain | Emerging Cross-Sectional Technologies | 16 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.