CoalTek, Inc.
9Patents
4Active
9Granted
37Portfolio score
Filing activity: Jun 26, 1975 → May 5, 2009 · 2 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4270762A | Disperser seal and method | Emerging Cross-Sectional Technologies | 21 | Expired |
| US8585788B2 | Methods and systems for processing solid fuel | Emerging Cross-Sectional Technologies | 7 | Active |
| US8585786B2 | Methods and systems for briquetting solid fuel | Mechanical Engineering; Lighting; Heating | 6 | Active |
| US4008042A | Coal heating temperature control | Chemistry; Metallurgy | 6 | Expired |
| US4021078A | Gas jet plug assembly | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| US7901473B2 | Pre-burning, dry process methodology and systems for enhancing solid fuel properties | Emerging Cross-Sectional Technologies | 4 | Active |
| US4040961A | Separation of solids from a liquid | Performing Operations; Transporting | 4 | Expired |
| US4060458A | Separation of gas from solids | Chemistry; Metallurgy | 2 | Expired |
| US8579998B2 | Pre-burning, dry process methodology and systems for enhancing metallurgical solid fuel properties | Emerging Cross-Sectional Technologies | 1 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.