Purafil, Inc.
20Patents
13Active
20Granted
51Portfolio score
Filing activity: Sep 2, 1987 → Jun 14, 2022 · 5 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4855276A | Solid filtration medium incorporating alumina and carbon | Performing Operations; Transporting | 71 | Expired |
| US5208162A | Method and apparatus for monitoring corrosion | Physics | 46 | Expired |
| US5733350A | Container for solid filtration media and filtration system utilizing same | Emerging Cross-Sectional Technologies | 31 | Expired |
| US5942323A | Fiber filter and methods of use thereof | Emerging Cross-Sectional Technologies | 28 | Expired |
| US6004522A | Solid filtration media incorporating elevated levels of permanganate and water | Performing Operations; Transporting | 12 | Expired |
| US8247346B2 | Dry scrubbing air filtration media | Performing Operations; Transporting | 5 | Active |
| US6265024A | Fiber filter and methods of use thereof | Emerging Cross-Sectional Technologies | 4 | Expired |
| US8420038B2 | Method for removing contaminants from a fluid stream | Performing Operations; Transporting | 3 | Active |
| US9108142B2 | High capacity solid filtration media | Performing Operations; Transporting | 3 | Active |
| US8182775B2 | Dry-scrubbing media compositions and methods of production and use | Performing Operations; Transporting | 3 | Active |
| US9370763B2 | High capacity solid filtration media | Performing Operations; Transporting | 1 | Active |
| US8343401B2 | Filtration media having recycled waste materials | Performing Operations; Transporting | 1 | Active |
| US7264644B2 | Methods and apparatuses for mounting a filtration housing for solid filtration media | Performing Operations; Transporting | 1 | Expired |
| US10151683B2 | Corrosion sensor using electrical continuity | Physics | 1 | Active |
| US8992867B2 | Dry-scrubbing media compositions and methods of production and use | Emerging Cross-Sectional Technologies | 1 | Active |
| US7862644B2 | Dry scrubber and method of converting a wet scrubber to a dry scrubber | Emerging Cross-Sectional Technologies | 1 | Active |
| US10857518B2 | Dry-scrubbing media compositions and methods of production and use | Emerging Cross-Sectional Technologies | 0 | Active |
| US12357935B2 | Filter module with radio-frequency identification tag for tuning a filtration system | Performing Operations; Transporting | 0 | Active |
| US8586502B2 | Dry scrubbing media compositions and methods of production and use | Performing Operations; Transporting | 0 | Active |
| US11040307B2 | Method for removing contaminant from a fluid stream | Performing Operations; Transporting | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.