Alfred Brack
28Patents
4h-index
10Co-inventors
60Inventor score
Filing activity: Jul 28, 1972 → Sep 14, 1995
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US3971807A | Cationic dyestuffs | Textiles; Paper | 54 | Expired |
| US4695633A | Chromogenic 4,4-diaryl-dihydroquinazolones, their preparation and their use | Performing Operations; Transporting | 13 | Expired |
| US3959310A | Cationic dyestuffs | Textiles; Paper | 10 | Expired |
| US3992405A | Cationic dyestuffs | Chemistry; Metallurgy | 4 | Expired |
| US3980651A | Water-insoluble barbituric acid-substituted naphthalactam dyestuff | Emerging Cross-Sectional Technologies | 3 | Expired |
| US4754034A | Chromogenic 4,4-diaryldihydroquinazolones | Chemistry; Metallurgy | 2 | Expired |
| US4080331A | Transfer printing process | Textiles; Paper | 2 | Expired |
| US3975150A | Transfer printing process | Emerging Cross-Sectional Technologies | 2 | Expired |
| US4234488A | Benz-[c,d]-indolyl compounds | Textiles; Paper | 2 | Expired |
| US4446326A | Cationic naphtholactam dyestuffs | Chemistry; Metallurgy | 1 | Expired |
| US4000130A | Cationic dyestuffs | Emerging Cross-Sectional Technologies | 1 | Expired |
| US4968797A | Chromogenic 4,4-diaryldihydroquinazolones | Chemistry; Metallurgy | 1 | Expired |
| US5328993A | Cationic triazatrimethine dyestuffs | Emerging Cross-Sectional Technologies | 1 | Expired |
| US4022799A | Naphtholactam dyestuffs | Chemistry; Metallurgy | 1 | Expired |
| US5541299A | Process for the preparation of dyestuffs | Chemistry; Metallurgy | 1 | Expired |
| US5578711A | Process for the preparation of dyestuffs | Chemistry; Metallurgy | 1 | Expired |
| US5502171A | Process for the preparation of dyestuffs | Chemistry; Metallurgy | 1 | Expired |
| US4220780A | Cationic dyestuffs | Chemistry; Metallurgy | 1 | Expired |
| US4283540A | Process for the preparation of cationic naphtholactam dyestuffs | Chemistry; Metallurgy | 1 | Expired |
| US4147865A | Benz-(C,D)-indolyl compounds | Textiles; Paper | 1 | Expired |
| US4203722A | Transfer printing process with naphtholactam dyes | Textiles; Paper | 1 | Expired |
| US4001253A | Naphtholactam dyestuffs | Chemistry; Metallurgy | 1 | Expired |
| US4310664A | Process for the preparation of pyridine-4-aldehyde phenylhydrazones | Chemistry; Metallurgy | 0 | Expired |
| US4396768A | Process for the preparation of anionic quinophthalone dyestuffs | Chemistry; Metallurgy | 0 | Expired |
| US4840641A | Cationic diazacyanine dyestuffs for dyeing polyacrylonitrile-wool blends | Emerging Cross-Sectional Technologies | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.