Average Co-Inventor Count = 3.43
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. Sun Chemical Corporation (2 from 590 patents)
2 patents:
1. 7115164 - Preparation of yellow pigments
2. 6537362 - Polyphosphoric acid swelling of organic pigments