Helmut Springer
46Patents
8h-index
38Co-inventors
75Inventor score
Filing activity: Mar 6, 1978 → Apr 18, 2007
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4483802A | Process for the preparation of sulfonated aryl phosphine | Chemistry; Metallurgy | 25 | Expired |
| US5264600A | Process for the recovery of rhodium from residues of the distillation of products of the oxo synthesis | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4330262A | Walking beam furnace | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US7799945B2 | Catalytic process for preparing aliphatic straight-chain and β-alkyl-branched carboxylic acids | Chemistry; Metallurgy | 10 | Active |
| US4172091A | Process for the manufacture of .beta.-(dimethylamino)-propionitrile | Chemistry; Metallurgy | 9 | Expired |
| US6800783B2 | Method for the synthesis of aliphatic carboxylic acids from aldehydes | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4283564A | Process for preparing methacrolein | Chemistry; Metallurgy | 9 | Expired |
| US7138544B2 | Process for preparing aliphatic straight-chain and beta-alkyl-branched carboxylic acids | Chemistry; Metallurgy | 8 | Expired |
| US4950800A | Process for the preparaton of 2-methylbutanal | Chemistry; Metallurgy | 7 | Expired |
| US5481044A | Process for the preparation of .alpha.-alkyl substituted aldehydes | Chemistry; Metallurgy | 7 | Expired |
| US4515986A | Process for preparing 3-dimethylamino-2,2-dimethylpropanal | Chemistry; Metallurgy | 7 | Expired |
| US4710321A | Quaternary ammonium salts of sulfonated triarylphosphines and process for the production thereof | Chemistry; Metallurgy | 6 | Expired |
| US6423856B1 | Process for preparing ester plasticizers | Performing Operations; Transporting | 6 | Expired |
| US5085835A | Process for recovering rhodium | Emerging Cross-Sectional Technologies | 6 | Expired |
| US6288288A | Process for preparing saturated alcohols | Chemistry; Metallurgy | 5 | Expired |
| US7015362B2 | Process for preparing TCD-dialdehyde | Chemistry; Metallurgy | 5 | Expired |
| US6982352B2 | Process for preparing N-methyldialkylamines from secondary dialkylamines and formaldehyde | Chemistry; Metallurgy | 5 | Expired |
| US4288643A | Process for preparing 2,3-dimethyl-butene-2 | Chemistry; Metallurgy | 5 | Expired |
| US4317945A | Process for preparing 2-methyl-2-sec.butyl-1,3-propanediol | Chemistry; Metallurgy | 5 | Expired |
| US4205013A | Process for the manufacture of 2,3-dimethylpentanal | Chemistry; Metallurgy | 5 | Expired |
| US4918247A | Process for the preparation of 2,2-dimethylpropanediol-1,3 | Chemistry; Metallurgy | 5 | Expired |
| US5064508A | Process for the separation of 2-methylalkanals from isomers thereof | Emerging Cross-Sectional Technologies | 4 | Expired |
| US6680395B2 | Method for the synthesis of straight-chain aliphatic carboxylic acids from aldehydes | Emerging Cross-Sectional Technologies | 4 | Expired |
| US4307252A | 2-Propyl-pent-4-en-1-al | Emerging Cross-Sectional Technologies | 4 | Expired |
| US5091546A | Novel rhodium recovery | Emerging Cross-Sectional Technologies | 4 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.