Average Co-Inventor Count = 2.00
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. Nalco Chemical Company (4 from 1,167 patents)
4 patents:
1. 4935542 - Naphthenic acid amides
2. 4827033 - naphthenic acid amides
3. 4752381 - Upgrading petroleum and petroleum fractions
4. 4589979 - Upgrading heavy gas oils