DC CO., LTD.
15Patents
3Active
15Granted
34Portfolio score
Filing activity: May 5, 1986 → Oct 26, 2011 · 2 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5366626A | Filter apparatus | Performing Operations; Transporting | 16 | Expired |
| US4979315A | Filtration apparatus with integral drying by electromagnetic radiation | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US5368732A | Horizontal belt filter | Performing Operations; Transporting | 7 | Expired |
| US8133317B2 | Cement additive and cement composition | Emerging Cross-Sectional Technologies | 5 | Active |
| US5019258A | Horizontal belt vacuum filtration apparatus | Performing Operations; Transporting | 4 | Expired |
| US5482623A | Filter press apparatus | Performing Operations; Transporting | 3 | Expired |
| US5130021A | Filtration apparatus | Performing Operations; Transporting | 3 | Expired |
| US5965020A | Endless belt filter | Performing Operations; Transporting | 3 | Expired |
| US8647015B2 | Artificial multi-barrier for a radioactive waste treatment facility | Emerging Cross-Sectional Technologies | 1 | Active |
| US5086963A | Web guidance and tracking mechanism for a continuous belt filter | Performing Operations; Transporting | 1 | Expired |
| US4857194A | Intermittent vacuum filter apparatus incorporating a double valve arrangement | Performing Operations; Transporting | 1 | Expired |
| US6036859A | Filter press apparatus | Performing Operations; Transporting | 1 | Expired |
| US5482627A | Separation method | Performing Operations; Transporting | 1 | Expired |
| US4708798A | Endless belt batch filtration apparatus | Performing Operations; Transporting | 0 | Expired |
| US9446380B2 | Water-blocking filler and filler for engineered multi-barriers using said water-blocking filler | Emerging Cross-Sectional Technologies | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.