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. Shell Oil Comapny (1 from 7,646 patents)
2. Pennzoil-Quaker State Company (1 from 15 patents)
2 patents:
1. 7268180 - Surface tinting composition and method of use
2. 6489393 - Surface tinting composition and method of use