Average Co-Inventor Count = 2.67
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. Engelhard Corporation (2 from 623 patents)
2 patents:
1. 5411587 - Paper coating kaolin pigments their preparation and use
2. 5169443 - Paper coating kaolin pigments there preparation and use