Membrane Technology and Research, Inc.
181Patents
71Active
181Granted
52Portfolio score
Filing activity: Jul 31, 1984 → Jun 24, 2021 · 28 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7732173B2 | Ethanol recovery process | Emerging Cross-Sectional Technologies | 115 | Active |
| US8220248B2 | Power generation process with partial recycle of carbon dioxide | Emerging Cross-Sectional Technologies | 112 | Active |
| US4963165A | Composite membrane, method of preparation and use | Chemistry; Metallurgy | 106 | Expired |
| US6361582B1 | Gas separation using C3+ hydrocarbon-resistant membranes | Performing Operations; Transporting | 100 | Expired |
| US6035641A | Membrane-augmented power generation | Mechanical Engineering; Lighting; Heating | 93 | Expired |
| US6572678B1 | Natural gas separation using nitrogen-selective membranes of modest selectivity | Chemistry; Metallurgy | 88 | Expired |
| US5089033A | Process for removing condensable components from gas streams | Performing Operations; Transporting | 87 | Expired |
| US8220247B2 | Power generation process with partial recycle of carbon dioxide | Emerging Cross-Sectional Technologies | 84 | Active |
| US4553983A | Process for recovering organic vapors from air | Performing Operations; Transporting | 81 | Expired |
| US6755975B2 | Separation process using pervaporation and dephlegmation | Chemistry; Metallurgy | 79 | Expired |
| US6011192A | Membrane-based conditioning for adsorption system feed gases | Chemistry; Metallurgy | 79 | Expired |
| US6579341B2 | Nitrogen gas separation using organic-vapor-resistant membranes | Emerging Cross-Sectional Technologies | 76 | Expired |
| US4857078A | Process for separating higher hydrocarbons from natural or produced gas streams | Performing Operations; Transporting | 74 | Expired |
| US5407466A | Sour gas treatment process including membrane and non-membrane treatment steps | Performing Operations; Transporting | 72 | Expired |
| US4857080A | Ultrathin composite metal membranes | Chemistry; Metallurgy | 70 | Expired |
| US5401300A | Sour gas treatment process including dehydration of the gas stream | Performing Operations; Transporting | 67 | Expired |
| US6161386A | Power generation method including membrane separation | Emerging Cross-Sectional Technologies | 64 | Expired |
| US5281255A | Gas-separation process | Performing Operations; Transporting | 64 | Expired |
| US4943475A | Multilayer composite protective fabric material and use in protective clothing | Emerging Cross-Sectional Technologies | 64 | Expired |
| US5407467A | Sour gas treatment process | Performing Operations; Transporting | 63 | Expired |
| US5199962A | Process for removing condensable components from gas streams | Performing Operations; Transporting | 62 | Expired |
| US5670051A | Olefin separation membrane and process | Performing Operations; Transporting | 61 | Expired |
| US5024594A | Protective clothing material | Emerging Cross-Sectional Technologies | 61 | Expired |
| US6565626B1 | Natural gas separation using nitrogen-selective membranes | Chemistry; Metallurgy | 61 | Expired |
| US5049167A | Multilayer interfacial composite membrane | Performing Operations; Transporting | 59 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.