Udo Bergmann
28Patents
6h-index
38Co-inventors
65Inventor score
Filing activity: Sep 24, 1976 → Feb 10, 1995
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4405330A | Navy disperse dye mixtures | Emerging Cross-Sectional Technologies | 11 | Expired |
| US4668775A | .alpha.-methine substituted thiophene monoazo dye | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4619992A | 3-(.beta.-aminoethyl)-4-cyano-isothiazolylazo dyes | Chemistry; Metallurgy | 9 | Expired |
| US4414552A | Printing head for ink jet printers | Performing Operations; Transporting | 8 | Expired |
| US4764600A | Isothiazolylazo dyes having aminophenyl and aminonaphthyl components | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4389216A | Navy dye mixtures | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4118229A | High energy recording on an acetyl acetonate | Physics | 6 | Expired |
| US4496480A | Isothiazolazo dyes having coupling components which are free from unsaturated aliphatic radicals | Chemistry; Metallurgy | 5 | Expired |
| US4751288A | Azo dyes containing 2-amino-3-cyano-5-formylthiophene derivatives as diazo components and substituted aniline compounds as coupling components | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4386934A | Navy dye mixtures | Emerging Cross-Sectional Technologies | 4 | Expired |
| US4547566A | Copper, cobalt, nickel and iron complexes of disazo dyes | Chemistry; Metallurgy | 4 | Expired |
| US4563520A | Metal complexes of dis- or trisazo compounds containing a middle component twice substituted by hydroxy and/or amino | Chemistry; Metallurgy | 4 | Expired |
| US4537597A | Navy blue mixtures of disperse mono-azo dyes for cellulose acetate | Emerging Cross-Sectional Technologies | 4 | Expired |
| US5424453A | Purification of indigo | Chemistry; Metallurgy | 3 | Expired |
| US4638055A | Iron, copper and chromium complexes of disazo dyes | Chemistry; Metallurgy | 3 | Expired |
| US4491543A | Dis-, tris-, and tetrakisazo compounds containing resorcinol, sulfonylamino, and two or three sulfonic acid groups | Chemistry; Metallurgy | 3 | Expired |
| US4960874A | Isothiazolylazo dyes having aminophenyl and aminonaphthyl components | Emerging Cross-Sectional Technologies | 3 | Expired |
| US5554774A | Preparation of chlorinated violanthrones or isoviolanthrones | Chemistry; Metallurgy | 2 | Expired |
| US4820809A | Heterocyclic azo dyes | Chemistry; Metallurgy | 2 | Expired |
| US4195223A | Apparatus for optically scanning a surface | Physics | 2 | Expired |
| US5536842A | Purification of indigo | Chemistry; Metallurgy | 2 | Expired |
| US4486198A | Navy dye mixtures | Emerging Cross-Sectional Technologies | 1 | Expired |
| US5003049A | Dyes containing fluorotriazine and dichloropyridazone groups | Chemistry; Metallurgy | 1 | Expired |
| US5386042A | Preparation of 1,4-diaminoanthraquinone-2,3-disulfonic acid and 1,4-diaminoanthraquinone-2,3-dinitrile | Chemistry; Metallurgy | 0 | Expired |
| US5534627A | Polycyclic vat dyes | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.