Klaus Gehrmann
45Patents
11h-index
32Co-inventors
75Inventor score
Filing activity: Aug 31, 1973 → May 2, 1994
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4003723A | Purification of crude hydrogen chloride | Chemistry; Metallurgy | 31 | Expired |
| US4556644A | Process for purifying and recovering contaminated catalyst solution obtained in the carbonylation of methyl acetate and/or dimethylether | Emerging Cross-Sectional Technologies | 29 | Expired |
| US4664753A | Process for separating iodine and its compounds from the carbonylation products obtained by subjecting dimethylether, methyl acetate or methanol to a carbonylation reaction | Chemistry; Metallurgy | 27 | Expired |
| US3954854A | Recovery of monomeric acrylic acid from residues originating from processed crude acrylic acid | Chemistry; Metallurgy | 24 | Expired |
| US4280010A | Continuous production of alkyl acrylates free from ether | Emerging Cross-Sectional Technologies | 23 | Expired |
| US4430273A | Production of acetic anhydride | Chemistry; Metallurgy | 23 | Expired |
| US4557760A | Process for recovering noble metals belonging to group VIII of the Periodic System of the elements from a contaminated catalyst solution originating from the carbonylation of methyl acetate and/or dimethylether | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4629711A | Process for purifying and recovering contaminated catalyst solution obtained in the carbonylation of methyl acetate and/or dimethylether | Emerging Cross-Sectional Technologies | 19 | Expired |
| US5380929A | Process for the preparation of acetic acid and acetic anhydride | Chemistry; Metallurgy | 17 | Expired |
| US4333884A | Production of acetic anhydride | Chemistry; Metallurgy | 17 | Expired |
| US4206078A | Production of space abrasion-resistant active carbon carriers or catalysts | Performing Operations; Transporting | 16 | Expired |
| US4101573A | Production of methyldichlorophosphane | Chemistry; Metallurgy | 10 | Expired |
| US4442304A | Process for purifying and recovering contaminated catalyst solution obtained in the carbonylation of methyl acetate and/or dimethylether | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4022826A | Production of beta-halogenoformyl-ethyl phosphinic acid halides | Chemistry; Metallurgy | 9 | Expired |
| US4440570A | Process for purifying and recovering contaminated catalyst solution obtained in the carbonylation of methyl acetate and/or dimethylether | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4717454A | Process for removing acetone from reaction mixtures of carbonylation reactions | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4746640A | Process for purifying and recovering catalyst solution contaminated during the carbonylation of methyl acetate and/or dimethylether | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4444624A | Process for separating acetone from carbonylation mixtures | Chemistry; Metallurgy | 7 | Expired |
| US4414160A | Process for making carboxylic acid halides | Chemistry; Metallurgy | 7 | Expired |
| US4012439A | Continuous production of n-butylacrylate free from dibutylether | Chemistry; Metallurgy | 6 | Expired |
| US4016048A | Distillative purification of 2,5-dioxo-1-oxa-2-phospholanes | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4260520A | Carrier-supported catalyst and process for making it | Chemistry; Metallurgy | 5 | Expired |
| US4045295A | Purification of sulfuric acid containing acetic acid | Chemistry; Metallurgy | 5 | Expired |
| US4518538A | Process for making methyldichlorophosphane | Chemistry; Metallurgy | 5 | Expired |
| US4543217A | Process for making carboxylic acid halides | Chemistry; Metallurgy | 4 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.