Average Co-Inventor Count = 2.67
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. Idemitsu Kosan Company, Limited (1 from 2,269 patents)
2. Idemitsu Petrochemical Co., Ltd. (1 from 555 patents)
2 patents:
1. 5712330 - Styrenic resin pellet and molding produced therefrom
2. 5391611 - Styrenic resin composition