Average Co-Inventor Count = 2.00
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. Ciba-geigy Corporation (1 from 6,850 patents)
2. Ciga-geigy Corporation (1 from 9 patents)
2 patents:
1. 4478724 - Cationic adsorption agent
2. 4424284 - Cationic adsorption agent