Average Co-Inventor Count = 3.00
ph-index = 2
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. Basf Corporation (2 from 2,036 patents)
2 patents:
1. 4952677 - Azo colorants for ball point pen and ribbon inks
2. 4800043 - Colorants for ball point pen and ribbon inks derived from pararosaniline