Average Co-Inventor Count = 2.25
ph-index = 3
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. The Mearl Corporation (1 from 31 patents)
3 patents:
1. 6533858 - Effect pigments with improved colorant adhesion
2. 5759255 - Pearlescent pigment for exterior use
3. 5423912 - Weather resistant pearlescent pigments