Average Co-Inventor Count = 2.57
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. 6361593 - Lustrous interference pigments with black absorption color
2. 6290766 - Lustrous interference pigments with black absorption color
3. 5611851 - Process for preparing unsupported metal oxide nacreous pigments