Average Co-Inventor Count = 2.57
ph-index = 3
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. Ethyl Corporation (3 from 1,362 patents)
3 patents:
1. 4643253 - Oil recovery process
2. 4588534 - Chemical composition
3. 4003857 - Concentrated aqueous olefins sulfonates containing carboxylic acid salt