Average Co-Inventor Count = 2.40
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. Other (2 from 832,812 patents)
2 patents:
1. 5246470 - Removal of sulfur from coal and pitch with dolomite
2. 5125932 - Dissolution of coal with petroleum pitch