Average Co-Inventor Count = 3.43
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. Amoco Corporation (2 from 1,528 patents)
2 patents:
1. 4662443 - Combination air-blown and oxygen-blown underground coal gasification
2. 4648450 - Method of producing synthesis gas by underground gasification of coal