Average Co-Inventor Count = 2.40
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. Societe Nationale Elf Aquitaine (1 from 235 patents)
2. Elf Aquitaine (1 from 29 patents)
2 patents:
1. 5612294 - Scleroglucan based drilling mud
2. 5525587 - Application of muds containing scleroglucan to drilling large diameter