Average Co-Inventor Count = 2.86
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. Basf Corporation (1 from 2,036 patents)
2. Engelhard Corporation (1 from 623 patents)
2 patents:
1. 11034841 - Carbon black in effect pigments
2. 6626989 - Rutile titanium dioxide effect pigments and production thereof