Udo Mayer
54Patents
10h-index
62Co-inventors
81Inventor score
Filing activity: Nov 12, 1980 → Jun 24, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4647675A | Rhodamine dyes | Textiles; Paper | 40 | Expired |
| US4935059A | Basic rhodamine dyes | Chemistry; Metallurgy | 23 | Expired |
| US4880769A | Transfer of catinic dyes in their deprotonated, electrically neutral form | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4912006A | Electrostatic toner | Physics | 15 | Expired |
| US4353833A | Cationic dyes | Textiles; Paper | 14 | Expired |
| US5410053A | Rhodamine derivatives | Physics | 13 | Expired |
| US4962190A | Azo dyes containing polyethyleneimine with an aniline diazo component and a hydroxynaphthalene, aminopyridine or acetoacetic coupling component | Emerging Cross-Sectional Technologies | 12 | Expired |
| US5827332A | Azo dyes and a method of making a hydrocarbon using an azo dye | Emerging Cross-Sectional Technologies | 12 | Expired |
| US5659053A | Preparation of Di- or triarylmethane dyes by oxidation | Chemistry; Metallurgy | 11 | Expired |
| US4828718A | Catalytic degradation of oxidizable organic and inorganic compounds in waters | Emerging Cross-Sectional Technologies | 10 | Expired |
| US5571898A | Basic dyes based on amides of j-acid (1-hydroxy-6-aminonaphthalene-3-sulfonic acid) and amides of j-acid | Chemistry; Metallurgy | 10 | Expired |
| US4975118A | Recording fluid containing phenyl azo naphthalene dyes for the ink jet process | Chemistry; Metallurgy | 9 | Expired |
| US5424404A | Biscationic azo dyes and intermediates therefor | Chemistry; Metallurgy | 9 | Expired |
| US4603202A | Fluoran colorants for recording systems | Chemistry; Metallurgy | 8 | Expired |
| US5015292A | Recording fluid for the ink jet process | Chemistry; Metallurgy | 7 | Expired |
| US4784668A | Novel heterocycle-containing trisazo dyes | Textiles; Paper | 7 | Expired |
| US5496378A | Imidazolymethylated copper phthalocyanine dyes | Emerging Cross-Sectional Technologies | 6 | Expired |
| US5750661A | Basic dyes based on amides of J-acid (1-hydroxy-6-aminonaphthalene-3-sulfonic acid) and amides of J-acid | Chemistry; Metallurgy | 6 | Expired |
| US5354904A | Sulfonamides derived from 1-hydroxy-6-aminonaphthalene-3-sulfonic acid (J acid) | Chemistry; Metallurgy | 6 | Expired |
| US5071987A | Quinoline-4-carboxylic acid derivatives | Chemistry; Metallurgy | 5 | Expired |
| US5378818A | Doubled azo dyes | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4648993A | Cationic phthalocyanine dyes | Chemistry; Metallurgy | 5 | Expired |
| US5051504A | Doubled triphenylmethane dyes having bis acylpiperazine linkage | Chemistry; Metallurgy | 4 | Expired |
| US5175260A | Disazo dyes with hydroxysulfonylnaphthalene coupling components | Chemistry; Metallurgy | 4 | Expired |
| US5750742A | Oligomeric triarylmethane dyes | Chemistry; Metallurgy | 4 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.