GESTRA AG
26Patents
2Active
26Granted
34Portfolio score
Filing activity: Dec 5, 1984 → Nov 7, 2013 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5669263A | Probe for monitoring liquid with protection against leakage | Physics | 18 | Expired |
| US5272921A | Probe for monitoring liquid | Physics | 14 | Expired |
| US5810327A | Shutoff valve with spring-loaded valve disk | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US5366349A | Automatic liquid pump with vapor flow prevention flow outlet valve | Emerging Cross-Sectional Technologies | 11 | Expired |
| US5457640A | Method of checking condensate dischargers | Physics | 10 | Expired |
| US4607661A | Check value | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4997069A | Electromotive drive for a control element | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4955536A | Thermally controlled valve | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US6148845A | Valve housing with a connecting part and a cap | Emerging Cross-Sectional Technologies | 5 | Expired |
| US5798698A | Method of monitoring the level of a liquid in a container | Physics | 5 | Expired |
| USD421091S | Valve housing and cap | General | 5 | Expired |
| US4995553A | Thermally controlled valve | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US5805052A | Cable system for signal transmission | Electricity | 4 | Expired |
| USD475349S1 | Plug adaptator | General | 4 | Expired |
| US6404209B1 | Measuring instrument for fill level sensors | Physics | 3 | Expired |
| USD407146S | Combined valve housing and cap | General | 2 | Expired |
| US5719342A | Probe with unilaterally cantilevered head housing | Physics | 2 | Expired |
| US6158664A | Bimetallic steam trap | Mechanical Engineering; Lighting; Heating | 2 | Expired |
| US6507468B1 | Controller for heat engineering installations | Mechanical Engineering; Lighting; Heating | 2 | Expired |
| US5069247A | Condensate drain with monitor device | Emerging Cross-Sectional Technologies | 2 | Expired |
| US4706699A | Steam trap | Emerging Cross-Sectional Technologies | 2 | Expired |
| US4586655A | Steam trap with thermal control element and method of assembling said trap | Emerging Cross-Sectional Technologies | 1 | Expired |
| USD383403S | Housing for electrical measuring, monitoring, regulating and controlling instruments | General | 1 | Expired |
| USD383401S | Housing for#electrical measuring, monitoring, regulating and controlling instruments | General | 1 | Expired |
| US10184611B2 | Detecting fluid properties of a multiphase flow in a condensate drain | Mechanical Engineering; Lighting; Heating | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.