Spirax-Sarco Limited
🏢 View company profile →55Patents
26Active
55Granted
45Portfolio score
Filing activity: Apr 13, 1978 → Jun 30, 2020 · 5 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5445187A | Condensate traps | Emerging Cross-Sectional Technologies | 26 | Expired |
| US5419203A | Flow meter having a contoured plug and resilient means | Physics | 24 | Expired |
| US5938409A | Gas powered fluid pump with exhaust assist valve | Mechanical Engineering; Lighting; Heating | 20 | Expired |
| US5941691A | Overcenter mechanism for a pressure powered pump | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US5230361A | Snap action toggle valve actuator assembly | Emerging Cross-Sectional Technologies | 12 | Expired |
| US5687755A | Equipment comprising a condensate trap | Emerging Cross-Sectional Technologies | 12 | Expired |
| US5698793A | Flow meters | Physics | 12 | Expired |
| US6935844B1 | Gas pressure driven fluid pump having magnetic valve control mechanism and method | Emerging Cross-Sectional Technologies | 10 | Expired |
| US7421908B2 | Electromagnetic flow sensing apparatus and method | Physics | 8 | Active |
| US9194730B2 | Method and apparatus for determining the phase compositions of a multiphase fluid flow | Physics | 7 | Active |
| US4681256A | Thermostatic steam traps | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US4560105A | Bellows-actuated thermostatic steam traps | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US4938174A | Steam boiler system | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US5020000A | Measuring dryness fraction | Physics | 6 | Expired |
| US7316241B1 | Steam trap | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4295605A | Steam traps | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US8918293B2 | Flow meter | Physics | 5 | Active |
| US5546976A | Condensate trap installations | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4660760A | Thermodynamic steam trap valve discs | Emerging Cross-Sectional Technologies | 4 | Expired |
| US8573250B1 | Steam trap with integrated temperature sensors | Emerging Cross-Sectional Technologies | 4 | Active |
| US9157829B2 | Apparatus and method for monitoring a steam plant | Physics | 4 | Active |
| US4875377A | Flowmeters | Physics | 3 | Expired |
| US4792090A | Thermostatic steam traps | Mechanical Engineering; Lighting; Heating | 3 | Expired |
| US5921268A | Condensate traps | Emerging Cross-Sectional Technologies | 3 | Expired |
| US5316213A | Condensate trap | Emerging Cross-Sectional Technologies | 3 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.