Karl E. Wiegand
18Patents
5h-index
12Co-inventors
63Inventor score
Filing activity: Jan 19, 1973 → Oct 10, 1996
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4595742A | Di(alkylthio)diamine chain extenders for polyurethane elastomers | Chemistry; Metallurgy | 30 | Expired |
| US5847177A | Production of hydrocarbon-soluble hydrocarbylaluminoxanes | Chemistry; Metallurgy | 9 | Expired |
| US5565395A | Aluminoxanate compositions | Chemistry; Metallurgy | 6 | Expired |
| US4070394A | Carnitine nitrile halide preparation | Chemistry; Metallurgy | 6 | Expired |
| US4917045A | Silicon compounds in poultry hatching | Human Necessities | 6 | Expired |
| US5252345A | Zeolite compositions | Human Necessities | 5 | Expired |
| US4187230A | Preparation of 5-aroyl-pyrrole compounds | Chemistry; Metallurgy | 4 | Expired |
| US4954448A | Modulation of adenylate cyclase response | Human Necessities | 3 | Expired |
| US4113771A | Process for the purification of citric acid | Chemistry; Metallurgy | 3 | Expired |
| US5183061A | Silicon compounds in bone treatment | Chemistry; Metallurgy | 3 | Expired |
| US4374256A | Process for the preparation of pyrryl-2-acetonitrile | Chemistry; Metallurgy | 2 | Expired |
| US3960941A | 3-Hydroxy-3,4-dicarbamoylbutyric acid and salts | Chemistry; Metallurgy | 2 | Expired |
| US4870191A | Silicon containing reaction product | Chemistry; Metallurgy | 2 | Expired |
| US4008271A | Process for preparing a mixed anhydride of a sulfonic acid and a carboxylic acid | Chemistry; Metallurgy | 1 | Expired |
| US3962287A | Chemical process for producing citric acid | Chemistry; Metallurgy | 1 | Expired |
| US3965168A | 3-Carbamoyl-3-hydroxyglutaric acid and salts | Chemistry; Metallurgy | 1 | Expired |
| US4066688A | Chemical process | Chemistry; Metallurgy | 0 | Expired |
| US3935216A | Preparation of toluoyl-5-pyrryl-2-acetonitrile | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.