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. Rhone-Progil (2 from 51 patents)
2 patents:
1. 4119645 - Method of preparing phthalic anhydride
2. 3933630 - Purification of waste water containing phthalic esters