Polysius AG
99Patents
27Active
99Granted
43Portfolio score
Filing activity: Aug 31, 1973 → Apr 15, 2011 · 26 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US3951347A | Apparatus for crushing material containing particles that are hard to pulverize | Performing Operations; Transporting | 32 | Expired |
| US4067623A | Pneumatic pressure conveyor for fine material | Performing Operations; Transporting | 20 | Expired |
| US4099802A | Hydrostatic bearing unit and a hydrostatic bearing assembly comprising several such bearing units | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US4099953A | Installation for heating starting materials for glass melting | Emerging Cross-Sectional Technologies | 15 | Expired |
| US3933394A | Apparatus for pneumatically withdrawing fine material from a silo container | Performing Operations; Transporting | 14 | Expired |
| US8677913B2 | Method and device for incinerating combustion material | Emerging Cross-Sectional Technologies | 13 | Active |
| US4118177A | Apparatus and method for calcining or sintering fine-grained material | Chemistry; Metallurgy | 11 | Expired |
| US4239300A | Hydrostatic bearing | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| US7712611B2 | Apparatus for controlling the separation of particulate material | Performing Operations; Transporting | 10 | Expired |
| US7510135B2 | Grinding roll | Performing Operations; Transporting | 9 | Expired |
| US4105396A | Apparatus for heat treatment of fine grained materials | Mechanical Engineering; Lighting; Heating | 9 | Expired |
| US3932117A | Method of burning or sintering fine-grain material | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US4127406A | Process for the heat treatment of fine material | Chemistry; Metallurgy | 8 | Expired |
| US4257766A | Processes and apparatus for the heat treatment of fine-grained material | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US4043746A | Method for the heat treatment of fine-grained materials containing alkali compounds | Chemistry; Metallurgy | 7 | Expired |
| US4014642A | Shaft cooler | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US4026154A | Sample taking apparatus | Physics | 7 | Expired |
| US4133488A | Roller mill with removable separator structure | Performing Operations; Transporting | 7 | Expired |
| US4191526A | Suspension gas preheater | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US4083676A | Method for heat treating fine-grain material | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US4029365A | Method for feeding powdered material | Performing Operations; Transporting | 6 | Expired |
| US4096642A | Apparatus for heat exchange between fine material and gas | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US6889843B1 | Apparatus and methods for controlling the separation of particulate material | Performing Operations; Transporting | 6 | Expired |
| US4109871A | Method and apparatus for processing abrasive material | Performing Operations; Transporting | 6 | Expired |
| US4060375A | Methods and apparatus for the heat treatment of fine-grained materials | Chemistry; Metallurgy | 6 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.