Memtec LLC
40Patents
2Active
40Granted
44Portfolio score
Filing activity: Feb 14, 1983 → Aug 11, 2021
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4921610A | Cleaning of hollow fibre filters | Performing Operations; Transporting | 112 | Expired |
| US5405528A | Modular microporous filter assemblies | Performing Operations; Transporting | 110 | Expired |
| US4793932A | Variable volume filter or concentrator | Performing Operations; Transporting | 98 | Expired |
| US4767539A | Cleaning of hollow fiber filters utilized in lumenal gas flow | Performing Operations; Transporting | 96 | Expired |
| US4931186A | Concentration of solids in a suspension | Performing Operations; Transporting | 93 | Expired |
| US5024762A | Concentration of solids in a suspension | Performing Operations; Transporting | 89 | Expired |
| US5194149A | Filter cartridge manifold | Performing Operations; Transporting | 85 | Expired |
| US5094750A | Hollow fibre filter cartridge and header | Performing Operations; Transporting | 84 | Expired |
| US4935143A | Cleaning of filters | Performing Operations; Transporting | 83 | Expired |
| US4876012A | Hollow fibre filter cartridge and header | Emerging Cross-Sectional Technologies | 81 | Expired |
| US4816160A | Cooling hollow fibre cross-flow separators | Performing Operations; Transporting | 75 | Expired |
| US4624784A | Apparatus including a flow path formed by membrane compression | Performing Operations; Transporting | 59 | Expired |
| US5141611A | Removing and recovering plant polyphenols | Performing Operations; Transporting | 47 | Expired |
| US5489406A | Method of making polyvinylidene fluoride membrane | Chemistry; Metallurgy | 41 | Expired |
| US4846976A | Treatment of emulsions | Performing Operations; Transporting | 37 | Expired |
| US4655927A | Separating oil emulsions | Performing Operations; Transporting | 27 | Expired |
| US5698101A | Hollow fiber membranes | Performing Operations; Transporting | 20 | Expired |
| US4814083A | Altering pore size distributions | Performing Operations; Transporting | 16 | Expired |
| US5620891A | Biological reaction processes | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4623463A | Formation of porous membranes | Chemistry; Metallurgy | 12 | Expired |
| US5395570A | Hollow fibre membrane extrusion | Chemistry; Metallurgy | 12 | Expired |
| US4661526A | Cross linked porous membranes | Chemistry; Metallurgy | 12 | Expired |
| US5529690A | Formation of porous materials | Performing Operations; Transporting | 11 | Expired |
| US5150051A | Home gaussmeter with filter-integrator circuit for measuring elf radiation | Physics | 10 | Expired |
| USD335526S | Valve housing | General | 9 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.