Norbert Lonhoff
13Patents
2h-index
17Co-inventors
43Inventor score
Filing activity: Aug 11, 1989 → Jul 26, 1996
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5127999A | Process for the preparation of alkali metal dichromates and chromic acid by electrolysis | Chemistry; Metallurgy | 9 | Expired |
| US5128000A | Dimensionally stable anodes and their use in the preparation of alkali metal dichromates and chromic acid | Chemistry; Metallurgy | 8 | Expired |
| US5096548A | Process for the preparation of chromic acid | Chemistry; Metallurgy | 2 | Expired |
| US4981573A | Process for the production of alkali dichromates and chromic acid employing an anode of valve metal activated by electrodepositing noble metals from melts | Chemistry; Metallurgy | 2 | Expired |
| US5250274A | Process for the production of sodium dichromate | Chemistry; Metallurgy | 2 | Expired |
| US5181994A | Process for the preparation of chromic acid | Chemistry; Metallurgy | 1 | Expired |
| US5273735A | Process for the preparation of sodium dichromate | Chemistry; Metallurgy | 1 | Expired |
| US5068015A | Electrochemical process for the production of chromic acid | Chemistry; Metallurgy | 1 | Expired |
| US5071522A | Process for the preparation of chromic acid | Chemistry; Metallurgy | 1 | Expired |
| US5051155A | Processes for the preparation of alkali metal dichromates and chromic acid | Chemistry; Metallurgy | 1 | Expired |
| US5094729A | Processes for the preparation of alkali metal dichromates and chromic acid | Chemistry; Metallurgy | 1 | Expired |
| US5667759A | Method for manufacturing alkali chromates from chromium ore | Chemistry; Metallurgy | 0 | Expired |
| US5505918A | Method for manufacturing alkali chromates from chromium ore | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.