Average Co-Inventor Count = 2.00
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. Nippon Oil Company (1 from 690 patents)
2. Petroleum Energy Center Foundation (1 from 5 patents)
1 patent:
1. 5240890 - Method of manufacturing hydrocarbon conversion catalyst