Klaus Hestermann
20Patents
5h-index
21Co-inventors
61Inventor score
Filing activity: Feb 12, 1975 → Oct 3, 1980
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4294621A | Production of an anticorrosive pigment on phosphate basis | Chemistry; Metallurgy | 10 | Expired |
| US4122123A | Production of quaternary phosphonium halides | Chemistry; Metallurgy | 9 | Expired |
| US4337092A | Corrosion-inhibiting pigment and paint composition | Chemistry; Metallurgy | 7 | Expired |
| US4073810A | Production of organophosphines | Chemistry; Metallurgy | 5 | Expired |
| US4308158A | Detergent and cleaning compositions containing polymeric phosphate builders | Chemistry; Metallurgy | 5 | Expired |
| US4265776A | Detergent and cleaning compositions | Chemistry; Metallurgy | 3 | Expired |
| US4136155A | Production of phosphine | Chemistry; Metallurgy | 2 | Expired |
| US4076755A | Production of hydroxyalkylphosphine oxides | Chemistry; Metallurgy | 2 | Expired |
| US4020110A | Production of tertiary methylphosphine oxides | Chemistry; Metallurgy | 2 | Expired |
| US4156697A | Production of alkylphosphines | Emerging Cross-Sectional Technologies | 2 | Expired |
| US4150058A | Production of alkyl phosphines | Emerging Cross-Sectional Technologies | 2 | Expired |
| US3997611A | Production of tertiary phosphine oxides | Chemistry; Metallurgy | 2 | Expired |
| US4091078A | Production of phosphine | Chemistry; Metallurgy | 1 | Expired |
| US3998886A | Production of halogen-containing tertiary phosphine oxides | Chemistry; Metallurgy | 1 | Expired |
| US4189449A | Production of quaternary phosphonium hydroxides | Chemistry; Metallurgy | 1 | Expired |
| US3980711A | Production of methylphosphine oxides | Chemistry; Metallurgy | 0 | Expired |
| US4028421A | Production of tertiary (hydroxymethyl)-methylphosphine oxides | Chemistry; Metallurgy | 0 | Expired |
| US4080384A | Production of (hydroxymethyl)-alkyl, cycloalkyl and aralkylphosphines | Performing Operations; Transporting | 0 | Expired |
| US4091012A | Production of tertiary phosphine oxides | Chemistry; Metallurgy | 0 | Expired |
| US4118590A | Phosphorbetaines and process for making them | Textiles; Paper | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.