Stefan Hari
25Patents
7h-index
19Co-inventors
66Inventor score
Filing activity: Sep 9, 1974 → Sep 26, 1994
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4044036A | Metal complexes of bis-azomethines from hydroxy-aldehydes and alkylene diamines | Chemistry; Metallurgy | 19 | Expired |
| US4138568A | Process for the manufacture of benzimidazolones-(2) | Chemistry; Metallurgy | 16 | Expired |
| US3956266A | Bis-(benzimidazolone-azo-acetoacetylamino)-phenylene pigments | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4992495A | Process for coloring high-molecular weight organic material using amine salts of azo pigments based on pyrazolone derivatives | Chemistry; Metallurgy | 9 | Expired |
| US5380870A | Mixed crystals of sulfonated diketopyrrolopyrroles | Chemistry; Metallurgy | 9 | Expired |
| US4980458A | Mixed sodium, ammonium and/or calcium salt crystals of laked monoazo disulfonated pyrazolone pigments | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4220586A | Hetero-aryl azo acylamino substituted aceto-acetarylide pigments | Chemistry; Metallurgy | 7 | Expired |
| US5151505A | Amine salts of azo pigments based on pyrazolone derivatives | Chemistry; Metallurgy | 5 | Expired |
| US4997920A | Monoazo compounds containing long-chain alkyl radicals | Chemistry; Metallurgy | 4 | Expired |
| US4737581A | Phenyl-azo-hydroxynaphthoic acid amide pigments containing at least one carbonamide group | Chemistry; Metallurgy | 4 | Expired |
| US4400319A | Monoazo pigments containing heterocycles, and high-molecular organic materials dyed therewith | Emerging Cross-Sectional Technologies | 3 | Expired |
| US4062838A | Disazo pigments containing acylamino groups | Chemistry; Metallurgy | 3 | Expired |
| US4946948A | Mono and disazo compounds based on b-hydroxy-naphthoic acid derivatives or acetoacetarylide derivatives containing long-chain alkyl ester or alkylamide radicals | Chemistry; Metallurgy | 3 | Expired |
| US4081439A | Aromatic disazo pigments | Chemistry; Metallurgy | 3 | Expired |
| US4031073A | Monoazo pigments containing barbituric acid or thio- or imino-derivatives thereof | Chemistry; Metallurgy | 3 | Expired |
| US5395926A | Bisazo, bisazomethine and azo-azomethine compounds derived from 1,4-phenylenediamine sulfonic acid salts | Chemistry; Metallurgy | 3 | Expired |
| US5280121A | Perylenetetracarboxylic acid diimides containing long-chain alkanoylamino radicals | Chemistry; Metallurgy | 2 | Expired |
| US4473500A | Monoazo pigments derived from aminophthalimides and substituted acetoacetarylides or 2-hydroxy-3-naphthoylarylides | Chemistry; Metallurgy | 2 | Expired |
| US4602961A | Process for pigmenting high molecular weight organic material | Chemistry; Metallurgy | 2 | Expired |
| US4263205A | Monoazo pigments derived from substituted aminothiophenes | Chemistry; Metallurgy | 1 | Expired |
| US5298609A | Disazo compounds containing cycloalkyl ester or cycloalkylamide groups | Chemistry; Metallurgy | 1 | Expired |
| US4088641A | 4-Methyl-5-(benzimidazolonylazo)-6-hydroxypyridone-2 pigment | Chemistry; Metallurgy | 1 | Expired |
| US5071967A | Disazo compounds containing long-chain alkyl ester radicals or alkylamide radicals | Chemistry; Metallurgy | 1 | Expired |
| US4093613A | Trisazo pigments containing two barbituric acid coupling components | Chemistry; Metallurgy | 0 | Expired |
| USRE35359E | Amine salts of azo pigments based on pyrazolone derivatives | General | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.