Gerhard Back
43Patents
7h-index
20Co-inventors
69Inventor score
Filing activity: Oct 29, 1973 → Nov 15, 2013
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4655783A | Process for photochemical stabilization of non-dyed and dyed polyamide fibre material and mixtures thereof | Emerging Cross-Sectional Technologies | 52 | Expired |
| US4704133A | Process for the photochemical stabilization of synthetic polyamide fibre materials with water-soluble copper complex dye | Emerging Cross-Sectional Technologies | 43 | Expired |
| US4655785A | Process for photochemical stabilization of polyamide and polyurethane fiber materials with metal complex compounds | Emerging Cross-Sectional Technologies | 18 | Expired |
| US4193916A | Sulfo- or carboxy-aryl amino sulfonyl phenyl azo hydroxpyridine heavy metal complex dyes | Textiles; Paper | 16 | Expired |
| US4033942A | Chromium complex dye, including azo and azo methine dye compounds | Textiles; Paper | 10 | Expired |
| US4085097A | Process for the manufacture of chromium complexes from metallizable azo or azo methine dyes | Chemistry; Metallurgy | 9 | Expired |
| US4116952A | Unsymmetrical azo - azo methine 1:2 chromium complex dyes | Textiles; Paper | 8 | Expired |
| US4053462A | Unsymmetrical phenyl azo naphthyl chromium complex dyes | Textiles; Paper | 6 | Expired |
| US3933785A | Azo compounds | Chemistry; Metallurgy | 5 | Expired |
| US4033716A | Transfer printing process for hydrophilic fibrous material | Textiles; Paper | 5 | Expired |
| US4001203A | Heavy metal complexes of azo dyestuffs containing a heterocyclic diazo component and the residue of 5-halogeno-2,3-dihydrozypyridine as coupling component | Chemistry; Metallurgy | 4 | Expired |
| US4331596A | Arylazoarylazo-substituted azo, azomethine 1:2 chromium complex dyes | Chemistry; Metallurgy | 4 | Expired |
| US4083839A | Unsymmetrical mono sulfo containing 1:2 azo, azo chromium complex dyes | Chemistry; Metallurgy | 3 | Expired |
| US4623358A | Process for dyeing natural or synthetic polyamide fibre materials with 1:1 metal complex dyes and fluoride, fluorosilicate or fluoroborate | Emerging Cross-Sectional Technologies | 3 | Expired |
| US4105400A | Process for dyeing natural protein fibres with metallic azo dyes | Textiles; Paper | 3 | Expired |
| US4141890A | Azo compounds having a 3-sulphomethyl-pyrazolone-(5) coupler component | Chemistry; Metallurgy | 3 | Expired |
| US4681596A | Process for dyeing natural or synthetic polyamide fibre materials with 1:1 metal complex dyes or mixtures of dyes with fluoride, fluorosilicate or fluoroborate | Emerging Cross-Sectional Technologies | 3 | Expired |
| US3970615A | Unsymmetrical mono-sulfo containing chromium complexes of azo dyes | Chemistry; Metallurgy | 2 | Expired |
| US4502860A | Bis-1:2-chromium complexes of disazo dyes, and their preparation and use | Emerging Cross-Sectional Technologies | 2 | Expired |
| US4013630A | Chromium complex disazo dyes | Textiles; Paper | 2 | Expired |
| US4678851A | Metal dye complexes containing an azo or azomethine dye and a colorless ligand with the C.dbd.N--N.dbd.C group | Chemistry; Metallurgy | 2 | Expired |
| US3971738A | Heavy metal complexes of azo compounds containing a halogeno-2,3-dihydroxy pyridine coupling component | Chemistry; Metallurgy | 2 | Expired |
| US4432898A | Sulfo-substituted fibre-reactive 1:2-chromium complex azo dyes | Textiles; Paper | 2 | Expired |
| US4818248A | Process for dyeing natural or synthetic polyamide fibre materials with 1:1 metal complex dyes in presence of alkali metal fluordsilicate or amindnlum silicate | Emerging Cross-Sectional Technologies | 2 | Expired |
| US4680385A | Metal dye complexes containing an azo or azomethine dye and a colorless ligand with the C.dbd.N--N.dbd.C group | Chemistry; Metallurgy | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.