Average Co-Inventor Count = 1.60
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. Hitachi Chemical Company, Ltd. (1 from 1,641 patents)
2. Showa Shell Sekiyu Kabushiki Kaisha (1 from 36 patents)
3. Maruzen Oil Co. Ltd. (1 from 32 patents)
4. Goi Chemical Company, Ltd. (1 from 2 patents)
2 patents:
1. 5234755 - Water absorptive and retentive flexible cloth and method for producing
2. 4166191 - Process for producing highly pure p-tertiary-butyl phenol