Average Co-Inventor Count = 1.85
ph-index = 7
The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.
Company Filing History:
1. Wella Aktiengesellschaft (33 from 433 patents)
2. Ciba-geigy Corporation (6 from 6,850 patents)
3. Ciba Specialty Chemicals Corporation (2 from 1,524 patents)
4. The Procter Gamble Company (1 from 17,167 patents)
42 patents:
1. RE41549 - Dyes for keratin fibers, the dyes containing n-benzyl-p-phenylenediamine derivatives and novel n-benzyl-p-phenylenediamine derivatives
2. 7641702 - O-Aminophenol derivatives and colorants containing said compounds
3. 7491244 - Oxidizing hair coloring agents containing m-aminophenol derivatives
4. 7455698 - Cationic dyes and dyestuff for keratin fibres containing said compounds
5. 7156884 - Compositions and methods for dyeing keratinous fibers
6. 7125428 - 1,3-Dihydroxybenzene derivatives and colorants containing said compounds
7. 7122061 - Agents for dyeing keratin fibers, containing 4-aminobiphenyl-3-ol-derivatives
8. 7074243 - N-benzyl-m-phenylenediamine derivatives and dyes containing said compounds
9. 7070626 - (P-amino-hydroxyphenyl)-acrylamide derivatives and dyes containing said compounds
10. 7056347 - Coloring agents for keratin fibers containing (1,1'-biphenyl)-2,4-diamine derivatives in addition to novel (1,1′-biphenyl)-2,4-diamine-derivatives
11. 6997961 - N-heteroarylmethyl-m-phenylenediamine derivatives-containing dyes for keratin fibers and novel n-heteroarylmethyl-m-phenylenediamine derivatives
12. 6936077 - 1,3-diamino-4-(aminomethyl)—benzene derivatives and colorants containing the said compounds
13. 6887281 - N-heteroarylmethyl-p-phenylenediamine derivatives as well as oxidation dyeing agents containing these compounds
14. 6875873 - 1,4-Diamino-2-(thiazol-2-yl)benzene derivatives, and dyes containing said compounds
15. 6849766 - 1,4-diamino-2-alkenylbenzene derivatives, and dyes containing these compounds