Robert Kuhlmann
22Patents
12h-index
27Co-inventors
81Inventor score
Filing activity: Apr 5, 1976 → Jul 8, 2010
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5484581A | Process for the production of precipitated silica | Chemistry; Metallurgy | 45 | Expired |
| US4857289A | Process for preparing precipitated silica | Chemistry; Metallurgy | 35 | Expired |
| US5705137A | Precipitated silicas, a process for their preparation and their use in vulcanizable rubber mixtures | Chemistry; Metallurgy | 29 | Expired |
| US4208316A | Hydrophobic precipitated silicic acid and compositions containing same | Emerging Cross-Sectional Technologies | 29 | Expired |
| US5846506A | Precipitated silicas | Chemistry; Metallurgy | 26 | Expired |
| US4273589A | Precipitated silicic acid, method and compositions containing same | Chemistry; Metallurgy | 21 | Expired |
| US5871867A | Precipitated silica | Emerging Cross-Sectional Technologies | 20 | Expired |
| US5110574A | Precipitated silicas and process for their production and use | Chemistry; Metallurgy | 20 | Expired |
| US5925708A | Precipitated silicas | Chemistry; Metallurgy | 18 | Expired |
| US4360388A | Cerium containing precipitated silica, process for its production | Chemistry; Metallurgy | 16 | Expired |
| US7871588B2 | Silica by precipitation at constant alkali number, and its use | Chemistry; Metallurgy | 16 | Expired |
| US4289681A | Boron containing precipitated silica | Chemistry; Metallurgy | 14 | Expired |
| US5859117A | Precipitated silicas, a process for their preparation and their use in vulcanizable rubber mixtures | Chemistry; Metallurgy | 11 | Expired |
| US4308074A | Precipitated silicic acid, method and compositions containing same | Chemistry; Metallurgy | 11 | Expired |
| US7097818B2 | Silica and silicate by precipitation at constant alkali number, and its use | Chemistry; Metallurgy | 11 | Expired |
| US6214383A | Precipitated silicas which contain an active substance | Human Necessities | 10 | Expired |
| US4038224A | Organically modified silicic acids and silicates for delustering lacquers | Emerging Cross-Sectional Technologies | 10 | Expired |
| US7204969B2 | High-structure precipitated silicas | Chemistry; Metallurgy | 9 | Expired |
| US7071257B2 | Precipitated silicas | Chemistry; Metallurgy | 5 | Expired |
| US6977065B1 | Precipitated silicas | Emerging Cross-Sectional Technologies | 4 | Expired |
| US8012253B2 | Efficient matting agents based on precipitated silicas | Emerging Cross-Sectional Technologies | 3 | Active |
| US7488382B2 | Efficient matting agents based on precipitated silicas | Emerging Cross-Sectional Technologies | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.