Zenon Environmental Inc.
86Patents
0Active
86Granted
38Portfolio score
Filing activity: Nov 2, 1987 → Aug 12, 2005
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5639373A | Vertical skein of hollow fiber membranes and method of maintaining clean fiber surfaces while filtering a substrate to withdraw a permeate | Emerging Cross-Sectional Technologies | 200 | Expired |
| US5783083A | Vertical cylindrical skein of hollow fiber membranes and method of maintaining clean fiber surfaces | Emerging Cross-Sectional Technologies | 191 | Expired |
| US5248424A | Frameless array of hollow fiber membranes and method of maintaining clean fiber surfaces while filtering a substrate to withdraw a permeate | Emerging Cross-Sectional Technologies | 191 | Expired |
| US5944997A | System for maintaining a clean skein of hollow fibers while filtering suspended solids | Emerging Cross-Sectional Technologies | 154 | Expired |
| US5670053A | Purification of gases from water using reverse osmosis | Emerging Cross-Sectional Technologies | 142 | Expired |
| US5766479A | Production of high purity water using reverse osmosis | Emerging Cross-Sectional Technologies | 139 | Expired |
| US6193890A | System for maintaining a clean skein of hollow fibers while filtering suspended solids | Chemistry; Metallurgy | 137 | Expired |
| US6354444B1 | Hollow fiber membrane and braided tubular support therefor | Performing Operations; Transporting | 135 | Expired |
| US5910250A | Baffle for conversion of fine bubbles to coarse while filtering with a vertical skein of hollow fibers | Emerging Cross-Sectional Technologies | 134 | Expired |
| US5403479A | In situ cleaning system for fouled membranes | Performing Operations; Transporting | 133 | Expired |
| US6245239A | Cyclic aeration system for submerged membrane modules | Emerging Cross-Sectional Technologies | 132 | Expired |
| US5501798A | Microfiltration enhanced reverse osmosis for water treatment | Chemistry; Metallurgy | 131 | Expired |
| US6214231A | System for operation of multiple membrane filtration assemblies | Performing Operations; Transporting | 117 | Expired |
| US6042677A | Potted header for hollow fiber membranes and method for making it | Emerging Cross-Sectional Technologies | 114 | Expired |
| US5914039A | Filtration membrane with calcined .alpha.-alumina particles therein | Emerging Cross-Sectional Technologies | 113 | Expired |
| US6375848B1 | Water filtration using immersed membranes | Emerging Cross-Sectional Technologies | 112 | Expired |
| US6325928A | Immersed membrane element and module | Performing Operations; Transporting | 111 | Expired |
| US5958243A | Apparatus and method for membrane filtration with enhanced net flux | Performing Operations; Transporting | 109 | Expired |
| US6550747B2 | Cyclic aeration system for submerged membrane modules | Emerging Cross-Sectional Technologies | 109 | Expired |
| USRE37549E1 | Vertical skein of hollow fiber membranes and method of maintaining clean fiber surfaces while filtering a substrate to withdraw a permeate | General | 104 | Expired |
| US5182019A | Cartridge of hybrid frameless arrays of hollow fiber membranes and module containing an assembly of cartridges | Performing Operations; Transporting | 104 | Expired |
| US6024872A | Method of making a dope comprising hydrophilized PVDF and .alpha.-alumina, and a membrane made therefrom | Emerging Cross-Sectional Technologies | 103 | Expired |
| US6361695B1 | Shipboard wastewater treatment system | Emerging Cross-Sectional Technologies | 103 | Expired |
| US5254253A | Modular shipboard membrane bioreactor system for combined wastewater streams | Emerging Cross-Sectional Technologies | 102 | Expired |
| US5250182A | "Membrane-based process for the recovery of lactic acid and glycerol from a ""corn thin stillage"" stream" | Emerging Cross-Sectional Technologies | 101 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.