Hch. Bertrams Aktiengesellschaft
7Patents
0Active
7Granted
25Portfolio score
Filing activity: Feb 15, 1974 → Feb 22, 1979
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4014735A | Concentration and separation of corrosive liquid mixtures | Emerging Cross-Sectional Technologies | 11 | Expired |
| US4138309A | Multi-stage apparatus for concentrating sulphuric acid | Emerging Cross-Sectional Technologies | 11 | Expired |
| US3933575A | Separation of corrosive liquid mixtures | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4279693A | Process for purifying polluted fluids | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4236974A | Process and apparatus for purifying waste waters | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4187904A | Heat transfer installation having storage reservoir containing a salt as a heat carrier | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4164441A | Process and apparatus for concentrating corrosive liquid using radiant heat | Performing Operations; Transporting | 4 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.