Average Co-Inventor Count = 5.00
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. Seitetsu Kagaku Co., Ltd. (2 from 50 patents)
2 patents:
1. 5075373 - Water retention material with water-absorbency
2. 4590227 - Water-swellable elastomer composition