Average Co-Inventor Count = 3.00
ph-index = 1
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. The Procter Gamble Company (2 from 17,164 patents)
2. Wella Aktiengesellschaft (1 from 433 patents)
3 patents:
1. 8152861 - Dark coloured azo dyes
2. 7977482 - Dark coloured azo dyes
3. 7544215 - Neutral and cationic naphthalene and colorants for keratin fibers containing these compounds