Johnson Filtration Systems
7Patents
0Active
7Granted
30Portfolio score
Filing activity: Jan 19, 1988 → Nov 15, 2002
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5156738A | Apparatus for uniformly distributing gas and/or liquid in an underdrain lateral system | Performing Operations; Transporting | 82 | Expired |
| US6851560B2 | Drain element comprising a liner consisting of hollow rods for collecting in particular hydrocarbons | Fixed Constructions | 37 | Expired |
| US5118419A | Slotted scallop-shaped underdrain screened lateral elements | Performing Operations; Transporting | 33 | Expired |
| US5015383A | Slotted screen scallops for high loading pressures and method of making same | Emerging Cross-Sectional Technologies | 16 | Expired |
| US5006228A | Mounting system for increasing the wear life of a vibrating screen panel | Performing Operations; Transporting | 10 | Expired |
| US4819722A | Metal well screen assembly with plastic end fitting and method of attaching same | Performing Operations; Transporting | 6 | Expired |
| US6785964B2 | Method for making a mechanical screen cylinder | Emerging Cross-Sectional Technologies | 6 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.