HYDAC FILTERTECHNIK GMBH
🏢 View company profile →125Patents
92Active
125Granted
53Portfolio score
Filing activity: Apr 11, 1990 → Jul 27, 2021 · 35 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5560824A | Filter device with closing arrangement and key opening connection | Performing Operations; Transporting | 76 | Expired |
| US7459078B2 | Filter device | Performing Operations; Transporting | 64 | Expired |
| US5736045A | Filter element with support body | Performing Operations; Transporting | 34 | Expired |
| US9044695B2 | Filter device and filter element for use with such a filter device | Performing Operations; Transporting | 25 | Active |
| US7018493B2 | Method for producing a connection interface in a filter element and device for producing the same | Emerging Cross-Sectional Technologies | 20 | Expired |
| US5073260A | Switchover device | Performing Operations; Transporting | 18 | Expired |
| US6695966B1 | Filter element provided with an ascending pipe | Performing Operations; Transporting | 17 | Expired |
| US5200067A | Device for mounting a filter element | Performing Operations; Transporting | 15 | Expired |
| US5474269A | Connection bracket clamp | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US6799687B1 | System and method for linear object reallocation in place | Performing Operations; Transporting | 13 | Expired |
| US6117312A | Filter bypass valve having adjustable spring biasing force | Emerging Cross-Sectional Technologies | 12 | Expired |
| US6733666B1 | Filtering device, especially a suction return filter | Performing Operations; Transporting | 11 | Expired |
| US7022228B2 | Filter device | Performing Operations; Transporting | 11 | Expired |
| US6949155B1 | Filter element comprising an embossed weld connection clip and device for producing the same | Emerging Cross-Sectional Technologies | 10 | Expired |
| US6863758B1 | Method of assembling plastic filter element with plastic casing | Emerging Cross-Sectional Technologies | 10 | Expired |
| US7232158B2 | Fitting for formation of a fluid-conducting connection | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US7997421B2 | Filtering apparatus and filter element | Performing Operations; Transporting | 7 | Active |
| US6347712B1 | Filter | Performing Operations; Transporting | 7 | Expired |
| US7435347B2 | Filter device and parts thereof and a method for operating of the filter device | Emerging Cross-Sectional Technologies | 7 | Active |
| US5816282A | Ventilation device with operating magnet | Emerging Cross-Sectional Technologies | 6 | Expired |
| US6620316B1 | Modular system for putting together different sized filter elements | Emerging Cross-Sectional Technologies | 6 | Expired |
| US7462282B2 | Filter element and method for the production thereof | Emerging Cross-Sectional Technologies | 6 | Expired |
| US8449765B2 | Filter with data storage provided with an antenna for transmitting signals | Performing Operations; Transporting | 6 | Active |
| US5622624A | Filter element with expandable metal jacket | Performing Operations; Transporting | 5 | Expired |
| US7279091B2 | Filter device | Performing Operations; Transporting | 5 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.