Average Co-Inventor Count = 4.80
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. North American Refractories Company (2 from 47 patents)
2 patents:
1. 5948713 - Cristobalite-free mullite grain and method of producing same
2. 5792251 - Method of producing metakaolin