Stopinc Aktiengesellschaft
75Patents
15Active
75Granted
40Portfolio score
Filing activity: Nov 18, 1974 → Jan 8, 2016 · 4 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4079869A | Device for replacing pouring pipes attached to metallurgical vessel spouts | Performing Operations; Transporting | 15 | Expired |
| US4627147A | Method of constructing a refractory plate assembly for use in a sliding closure unit | Emerging Cross-Sectional Technologies | 12 | Expired |
| US4376501A | Closure element and assembly of a slide closure for use in liquid melt containers | Performing Operations; Transporting | 12 | Expired |
| US4708191A | Apparatus for indicating the level in metallurgical vessels by electromagnetic means | Performing Operations; Transporting | 12 | Expired |
| US4219188A | Slide valve for the injection of material for use in the outlet of a metallurgical vessel | Performing Operations; Transporting | 11 | Expired |
| US6045015A | Coupling for a linear actuator and a sliding valve unit for a sliding gate valve of a molten metal vessel | Performing Operations; Transporting | 11 | Expired |
| US4257543A | Three-plate slide valve closure for liquid melt containers | Performing Operations; Transporting | 11 | Expired |
| US4265379A | Closure element of a slide closure for use in liquid melt containers | Performing Operations; Transporting | 10 | Expired |
| US4867428A | Device for clamping fireproof plates in metal frames of slide-valve shutters | Performing Operations; Transporting | 10 | Expired |
| US6092701A | Fireproof plate and a clamping device for a sliding gate at the outlet of a vessel containing molten metal | Performing Operations; Transporting | 9 | Expired |
| US4424958A | Linear sliding closure unit | Performing Operations; Transporting | 9 | Expired |
| US4848604A | Slide gate valve at the nozzle of a vessel containing molten metal | Performing Operations; Transporting | 9 | Expired |
| US5042700A | Process and equipment to determine disturbance variables when pouring molten metal from a container | Performing Operations; Transporting | 9 | Expired |
| US5174361A | Automatic casting process of a continuous casting machine | Performing Operations; Transporting | 8 | Expired |
| US5698129A | Sliding gate valve for a metallurgical vessel | Performing Operations; Transporting | 8 | Expired |
| US4141478A | Slide plate assembly | Chemistry; Metallurgy | 8 | Expired |
| US8740024B2 | Closing plate and sliding closure on the spout of a receptacle for molten metal | Performing Operations; Transporting | 7 | Active |
| US4659118A | Pipe seal connection between confronting ends of two coaxial relatively rotatable pipes | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US5154875A | Slide gate nozzle or shut-off control valve for metallurgical vessel and refractory shut-off parts thereof | Performing Operations; Transporting | 7 | Expired |
| US4708327A | Discharge nozzle assembly and methods of formation and operation thereof | Performing Operations; Transporting | 7 | Expired |
| US8498740B2 | Arrangement for the maintenance of a sliding closure mounted on the spout of a container for molten metal | Performing Operations; Transporting | 7 | Active |
| US4586699A | Refractory plate assembly for use in sliding closure unit | Performing Operations; Transporting | 6 | Expired |
| US3931913A | Slide gate nozzle | Performing Operations; Transporting | 6 | Expired |
| US4480771A | Rotary nozzle system for metallurgical vessels | Performing Operations; Transporting | 6 | Expired |
| US5836485A | Sliding gate valve assembly for a vessel containing molten metal | Performing Operations; Transporting | 6 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.