Average Co-Inventor Count = 2.29
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. Ciba-geigy Ag (4 from 595 patents)
4 patents:
1. 4917992 - Developing agents
2. 4753869 - Photographic developing agents containing stable, soluble,
3. 4732981 - 3-pyrazolidinone salts
4. 4687846 - Pyrazolidinone salts as developing agents