Hansgeorg Ernst
39Patents
6h-index
54Co-inventors
72Inventor score
Filing activity: Sep 30, 1982 → Oct 12, 2016
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4645845A | Novel optically active chroman derivatives, their preparation and novel intermediates | Chemistry; Metallurgy | 17 | Expired |
| US5455362A | Preparation of astaxanthin novel intermediates therefor and the preparation thereof | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4705553A | Method of reducing plant growth height using phenylalkylmorpholines | Chemistry; Metallurgy | 12 | Expired |
| US9493385B2 | Process for the preparation of (3E, 7E)-homofarnesol | Chemistry; Metallurgy | 9 | Active |
| US5654488A | Preparation of astaxanthin | Chemistry; Metallurgy | 8 | Expired |
| US5625099A | Preparation of astaxanthin, novel intermediates therefor and the preparation thereof | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4937308A | Preparation of alkyl O,O-dialkyl-.gamma.-phosphonotiglates | Chemistry; Metallurgy | 6 | Expired |
| US5210314A | Preparation of canthaxanthin and astaxanthin | Chemistry; Metallurgy | 5 | Expired |
| US4778531A | Epimerization of sugars, in particular of D-arabinose to D-ribose | Chemistry; Metallurgy | 5 | Expired |
| US8673598B2 | Microbial succinic acid producers and purification of succinic acid | Chemistry; Metallurgy | 4 | Active |
| US6747177B2 | Process for the preparation of meso-zeaxanthin | Emerging Cross-Sectional Technologies | 4 | Expired |
| US6743954B2 | Process for the preparation of meso-zeaxanthin | Emerging Cross-Sectional Technologies | 4 | Expired |
| US6699911B2 | Catalytic reduction of alkyne compounds | Emerging Cross-Sectional Technologies | 3 | Expired |
| US4567261A | Preparation of riboflavin | Chemistry; Metallurgy | 3 | Expired |
| US4716243A | .alpha.-(o-chlorophenyl)-aminomethylene-.beta.-formylaminopropionitrile | Chemistry; Metallurgy | 2 | Expired |
| US4550182A | Preparation of .alpha.-tocopherol | Chemistry; Metallurgy | 2 | Expired |
| US5053223A | Process and agents for control of white coffee-leaf miners, especially Perileucoptera coffeella | Human Necessities | 2 | Expired |
| US9023632B2 | Microbial succinic acid producers and purification of succinic acid | Chemistry; Metallurgy | 1 | Active |
| US4518813A | Optically active units for the synthesis of the side chain of (R,R,R)-.alpha.-tocopherol and their preparation | Chemistry; Metallurgy | 1 | Expired |
| US7271296B2 | Method for the production of phytofluene | Chemistry; Metallurgy | 1 | Expired |
| US6673971B2 | Preparation of 1,1,4,4-tetramethoxy-2-butene | Chemistry; Metallurgy | 1 | Expired |
| US6610892B2 | Process for preparing 2,7-dimethyl-2,4,6-octatrienal monoacetals | Chemistry; Metallurgy | 1 | Expired |
| US9061982B2 | Process for the preparation of oxovinylionol and its O-protected derivatives | Emerging Cross-Sectional Technologies | 1 | Active |
| US4656275A | Preparation of riboflavin, and 4,5-dimethyl-N-(D)-ribityl-2-(O-alkoxyphenylazo)-aniline intermediates | Chemistry; Metallurgy | 1 | Expired |
| US7378558B2 | Method for producing carotenoids | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.