Average Co-Inventor Count = 3.00
ph-index = 3
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. Nippon Steel Corporation (3 from 3,542 patents)
2. Nippon Steel Chemical Co., Ltd. (2 from 173 patents)
3 patents:
1. 4845185 - Soluble copolyimide from 9,9-bis (4-amino phenyl) fluorene
2. 4833214 - Soluble heat-resistant aromatic polyamide terminated with aromatic amido
3. 4794159 - Heat-resistant polyamide from bis(4-aminophenyl)fluorene