Average Co-Inventor Count = 3.00
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. Elf France (2 from 113 patents)
2 patents:
1. 5269954 - Nitrogenous additives with an antioxidant action and lubricating
2. 5062977 - Sulphur-containing additives to lubricants with antiwear and