Average Co-Inventor Count = 3.60
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. Minnesota Mining and Manufacturing Company (3 from 7,865 patents)
3 patents:
1. 5468536 - Sorbent articles
2. 4944905 - Particulate ceramic useful as a proppant
3. 4680230 - Particulate ceramic useful as a proppant