Filtertek Inc.
53Patents
6Active
53Granted
41Portfolio score
Filing activity: May 19, 1977 → Mar 10, 2009 · 6 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5360413A | Needleless access device | Emerging Cross-Sectional Technologies | 432 | Expired |
| US4113627A | Process for making hermetically sealed filter units and filters made thereby | Emerging Cross-Sectional Technologies | 161 | Expired |
| US4966199A | Diaphragm-type center flow check valve | Emerging Cross-Sectional Technologies | 118 | Expired |
| US6221065A | "Self-priming needle-free ""Y""-adapter" | Emerging Cross-Sectional Technologies | 105 | Expired |
| US4414172A | Process and apparatus for sealing a plurality of filter elements | Performing Operations; Transporting | 99 | Expired |
| US5688460A | Process for making hermetically sealed filter units | Emerging Cross-Sectional Technologies | 95 | Expired |
| US4749003A | Center flow check valve | Emerging Cross-Sectional Technologies | 93 | Expired |
| US6228069A | Needleless access device | Emerging Cross-Sectional Technologies | 86 | Expired |
| US7520489B2 | Fluid handling device and method of making same | Emerging Cross-Sectional Technologies | 71 | Expired |
| US5556541A | Process for making hermetically sealed filter units and filters made thereby | Emerging Cross-Sectional Technologies | 64 | Expired |
| US6168653A | Pressure transmission apparatus | Performing Operations; Transporting | 57 | Expired |
| US8038123B2 | Fluid handling device and method of making same | Emerging Cross-Sectional Technologies | 55 | Active |
| US5049274A | Friction welding process and filter formed thereby | Mechanical Engineering; Lighting; Heating | 55 | Expired |
| US4608166A | Press fit filter | Emerging Cross-Sectional Technologies | 54 | Expired |
| US7673653B2 | Check valve | Emerging Cross-Sectional Technologies | 52 | Active |
| US5827429A | Intravenous filter device | Human Necessities | 51 | Expired |
| US4828694A | Filter with filtration envelope spacing means | Mechanical Engineering; Lighting; Heating | 49 | Expired |
| US7041217B1 | Filter rings | Performing Operations; Transporting | 44 | Expired |
| US5417860A | Bottle filter and pouring device | Chemistry; Metallurgy | 43 | Expired |
| US4826598A | Hermetically sealed transmission filter | Emerging Cross-Sectional Technologies | 36 | Expired |
| US5049271A | Fuel tank filter | Mechanical Engineering; Lighting; Heating | 32 | Expired |
| US5741134A | Filter and universal adapter for use with dental aspirator tips | Human Necessities | 29 | Expired |
| US7141097B2 | Bacterial retentive, air venting, intravenous filter | Human Necessities | 27 | Expired |
| US5674200A | Air eliminator | Human Necessities | 25 | Expired |
| US4601820A | Low-profile inline filter | Performing Operations; Transporting | 24 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.