Karin H. Beck
26Patents
11h-index
44Co-inventors
71Inventor score
Filing activity: Sep 7, 1989 → May 17, 2001
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5282894A | Use of a liquid containing IR dyes as printing ink | Chemistry; Metallurgy | 106 | Expired |
| US5162545A | Malonic acid dyes and polycondensation products thereof | Chemistry; Metallurgy | 54 | Expired |
| US5804447A | Use of compounds which absorb and/or fluoresce in the IR region as markers for liquids | Emerging Cross-Sectional Technologies | 40 | Expired |
| US6312958A | Method for marking liquids with at least two marker substances and method for detecting them | Emerging Cross-Sectional Technologies | 40 | Expired |
| US5998211A | Use of compounds which absorb and/or fluoresce in the IR region as markers for liquids | Emerging Cross-Sectional Technologies | 25 | Expired |
| US5431723A | Use of liquid preparations of a disazo dye in the ink jet process and the diazo dye | Chemistry; Metallurgy | 18 | Expired |
| US5487770A | Detection of marked mineral oils and novel azo dyes | Physics | 14 | Expired |
| US5151516A | Polymerizable perylene-3,4,9,10-tetracarbimides | Chemistry; Metallurgy | 13 | Expired |
| US5827332A | Azo dyes and a method of making a hydrocarbon using an azo dye | Emerging Cross-Sectional Technologies | 12 | Expired |
| US5231140A | Preparation of polymers with side groups with NLO activity, and the use thereof | Chemistry; Metallurgy | 12 | Expired |
| US5891227A | Aqueous dye preparations | Chemistry; Metallurgy | 11 | Expired |
| US5500141A | Magnetic ink concentrate | Electricity | 9 | Expired |
| US5567233A | Process for preparing ballpoint pen pastes with colored metal oxide pigments | Chemistry; Metallurgy | 7 | Expired |
| US5250207A | Magnetic ink concentrate | Electricity | 6 | Expired |
| US6340745B1 | Phthalocyanine and use of phthalocyanine as a marking agent | Chemistry; Metallurgy | 6 | Expired |
| US5697984A | Dye preparations with ethylene oxide-castor oil reaction products | Chemistry; Metallurgy | 4 | Expired |
| US5529872A | Electrostatic toners containing a metal complex dye as charge stabilizer | Physics | 4 | Expired |
| US5616644A | Dyestuff-containing aqueous dispersions | Chemistry; Metallurgy | 4 | Expired |
| US6616712B1 | Use of compositions containing bisazo compounds for detecting fissures | Chemistry; Metallurgy | 3 | Expired |
| US5814139A | Ballpoint pen pastes with phthalocyanine pigments | Chemistry; Metallurgy | 1 | Expired |
| US5071588A | Liquid-crystalline mixture containing an azulenesquaric acid dye | Chemistry; Metallurgy | 1 | Expired |
| US5491043A | Electrostatic toners with polyamine charge stabilizers | Emerging Cross-Sectional Technologies | 1 | Expired |
| US5478940A | Double benzimidazoles | Physics | 0 | Expired |
| US5990327A | Use of aminotriarylmethanes for marking hydrocarbons and novel aminotriarylmethanes | Chemistry; Metallurgy | 0 | Expired |
| US5663028A | Electrostatic toners containing aminodiacetic acid derivatives | Physics | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.