Aligena AG
24Patents
0Active
24Granted
34Portfolio score
Filing activity: Aug 31, 1978 → Apr 5, 1995
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4778596A | Semipermeable encapsulated membranes, process for their manufacture and their use | Performing Operations; Transporting | 66 | Expired |
| US5028337A | Coated membranes | Performing Operations; Transporting | 52 | Expired |
| US4833014A | Composite membranes useful for the separation of organic compounds of low molecular weight from aqueous inorganic salts containing solutions | Emerging Cross-Sectional Technologies | 49 | Expired |
| US4690766A | Chemically modified semipermeable polysulfone membranes and their use in reverse osmosis and ultrafiltration | Performing Operations; Transporting | 48 | Expired |
| US5049282A | Semipermeable composite membranes | Performing Operations; Transporting | 48 | Expired |
| US4911844A | Modified polyvinylalcohol containing semipermeable composite membranes, process for their manufacture and their use | Performing Operations; Transporting | 44 | Expired |
| US5087338A | Process and device for separating electrically charged macromolecular compounds by forced-flow membrane electrophoresis | Chemistry; Metallurgy | 41 | Expired |
| US5039421A | Solvent stable membranes | Performing Operations; Transporting | 41 | Expired |
| US4659474A | Dynamically formed membranes | Performing Operations; Transporting | 37 | Expired |
| US4690765A | Chemically modified semipermeable membranes and their use in reverse osmosis and ultrafiltration | Chemistry; Metallurgy | 35 | Expired |
| US4767645A | Composite membranes useful for the separation of organic compounds of low molecular weight from aqueous inorganic salts containing solutions | Emerging Cross-Sectional Technologies | 34 | Expired |
| US5032282A | Solvent-stable semipermeable composite membranes | Performing Operations; Transporting | 33 | Expired |
| US4604204A | Porous, semipermeable membranes of chemically modified cellulose acetate | Performing Operations; Transporting | 29 | Expired |
| US4584103A | Reverse osmosis of ultrafiltration modified polyacrylonitrile-containing membrane | Chemistry; Metallurgy | 28 | Expired |
| US4889636A | High flux RO/UF membranes | Performing Operations; Transporting | 27 | Expired |
| US4720345A | Semipermeable membranes of modified styrene-based polymers, process for their manufacture and their use | Performing Operations; Transporting | 24 | Expired |
| US4477634A | Modified acrylonitrile polymer containing semipermeable membranes | Performing Operations; Transporting | 22 | Expired |
| US4753725A | Semipermeable composite membranes, their manufacture, and use | Performing Operations; Transporting | 19 | Expired |
| US5024765A | Composite membranes and processes using them | Performing Operations; Transporting | 17 | Expired |
| US5304307A | Chargedasymmetric mosaic membrances | Performing Operations; Transporting | 17 | Expired |
| US4247401A | Reverse osmosis separation process using porous asymmetric acetyl cellulose membrane | Performing Operations; Transporting | 15 | Expired |
| US5597863A | Immobilized buffered gels and membranes of hydroxy groups containing polymers | Physics | 10 | Expired |
| US5599506A | Immobilized buffered gels and membranes of hydroxy groups containing polymers | Physics | 6 | Expired |
| US5430099A | Immobilized buffered gels and membranes of hydroxy groups containing polymers | Physics | 5 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.