Krupp Polysius AG
166Patents
0Active
166Granted
41Portfolio score
Filing activity: Nov 2, 1979 → Apr 10, 2002
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4720262A | Apparatus for the heat treatment of fine material | Mechanical Engineering; Lighting; Heating | 93 | Expired |
| US4395164A | Pneumatic tube installation for posting samples of material | Performing Operations; Transporting | 80 | Expired |
| US4628657A | Ceiling and wall construction | Mechanical Engineering; Lighting; Heating | 39 | Expired |
| US4662909A | Cyclone construction | Chemistry; Metallurgy | 26 | Expired |
| US5620116A | Rotary vane gate | Performing Operations; Transporting | 25 | Expired |
| US5375776A | Method and apparatus for the comminution of material for grinding | Emerging Cross-Sectional Technologies | 24 | Expired |
| US4762220A | Side scraper for a heap of loose material | Performing Operations; Transporting | 23 | Expired |
| US5264013A | Method and apparatus for purification of exit gases from kiln installations | Performing Operations; Transporting | 23 | Expired |
| US4381897A | Installation for transporting fine-grained material | Chemistry; Metallurgy | 23 | Expired |
| US4797091A | Method and apparatus for utilizing the heat energy of domestic and commercial refuse | Emerging Cross-Sectional Technologies | 22 | Expired |
| US4485684A | Apparatus for extracting and analysing dust-laden gas samples | Physics | 22 | Expired |
| US5253816A | Material crushing roller construction | Electricity | 20 | Expired |
| US4846666A | Method and burner for burning fuel | Mechanical Engineering; Lighting; Heating | 20 | Expired |
| US5219544A | Method of purifying the exhaust gases from plants for the production of cement clinker | Emerging Cross-Sectional Technologies | 19 | Expired |
| US4737294A | Matrix-ring magnetic separator | Performing Operations; Transporting | 19 | Expired |
| US4322116A | Hydrodynamic bearing | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US4762489A | Cooling apparatus | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US4514170A | Apparatus for the heat treatment of fine-grained material | Mechanical Engineering; Lighting; Heating | 18 | Expired |
| US4402667A | Process and an installation for the heat-treatment of fine-grained material | Chemistry; Metallurgy | 17 | Expired |
| US4732561A | Apparatus for cooling hot material | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US5000392A | Grinding roller | Performing Operations; Transporting | 16 | Expired |
| US5549471A | Cooler grate for a reciprocating grate cooler | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US6644479B1 | Method and air separator for classifying charging material reduced in size | Performing Operations; Transporting | 16 | Expired |
| US5985221A | Method of recovering precious metals | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4771641A | Sample divider | Physics | 14 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.