Average Co-Inventor Count = 3.00
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. Sun Refining and Marketing Company (2 from 55 patents)
2. Xerxes Corporation (1 from 25 patents)
2 patents:
1. 5544974 - System for underground storage and delivery of liquid product, and
2. 4958957 - System for underground storage and delivery of liquid product, and