Franz Hund
28Patents
12h-index
29Co-inventors
77Inventor score
Filing activity: Jan 11, 1973 → Mar 28, 1983
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US3946103A | Production of precipitated red iron (III) oxide pigment relatively free of .alpha.-FEOOH | Chemistry; Metallurgy | 43 | Expired |
| US4082905A | Production of iron oxide pigments with improved resistance to oxidation | Chemistry; Metallurgy | 38 | Expired |
| US3931025A | Magnetic iron oxides with improved orientability and a process for their production | Chemistry; Metallurgy | 31 | Expired |
| US4404254A | Production of lamellar iron oxide pigments | Emerging Cross-Sectional Technologies | 26 | Expired |
| US3947502A | Production of finely divided acicular magnetic iron oxides | Chemistry; Metallurgy | 23 | Expired |
| US4290799A | Ferromagnetic metal pigment essentially consisting of iron and a process for its production | Physics | 20 | Expired |
| US4400432A | Coating iron oxide particles for magnetic recording | Emerging Cross-Sectional Technologies | 17 | Expired |
| US4156613A | Anti-corrosion pigments | Chemistry; Metallurgy | 17 | Expired |
| US4090888A | Production of black iron oxide pigments | Chemistry; Metallurgy | 16 | Expired |
| US4234348A | Process for the production of iron oxide red pigments | Chemistry; Metallurgy | 13 | Expired |
| US4112063A | Continuous production of iron oxide hydroxide | Chemistry; Metallurgy | 13 | Expired |
| US4589906A | Inorganic depot fertilizers | Chemistry; Metallurgy | 12 | Expired |
| US4036662A | Metal additions to pigments of pseudobrookite-titanium dioxide structure | Chemistry; Metallurgy | 12 | Expired |
| US3974079A | Production of gamma iron oxide | Chemistry; Metallurgy | 11 | Expired |
| US4323596A | Coating iron oxide particles for magnetic recording | Emerging Cross-Sectional Technologies | 11 | Expired |
| US4285726A | Active anti-corrosion pigments based on calcium oxide, aluminium oxide and iron oxide | Chemistry; Metallurgy | 10 | Expired |
| US4492600A | Corrosion-inhibiting paints and lacquers | Chemistry; Metallurgy | 9 | Expired |
| US4140539A | Hydrothermal process for producing dense iron oxide pigments | Chemistry; Metallurgy | 8 | Expired |
| US4014710A | Magnetic pigments with improved orientability and a process for their production | Chemistry; Metallurgy | 8 | Expired |
| US4443264A | Halogen-free zinc ferrite yellow pigments containing alumina and phosphorus oxide and production | Chemistry; Metallurgy | 6 | Expired |
| US4153465A | CaZn.sub.2 (PO.sub.4).sub.2 .2H.sub.2 O anticorrosion pigment | Chemistry; Metallurgy | 6 | Expired |
| US4264462A | Stabilization of magnetite pigments with heterocyclic nitrogen compounds | Chemistry; Metallurgy | 6 | Expired |
| US4358431A | Production of magnetic iron oxides | Chemistry; Metallurgy | 5 | Expired |
| US4369265A | Readily dispersible silicone-coated finely divided solids | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4211565A | Iron oxide-based anti-corrosion pigments | Chemistry; Metallurgy | 4 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.