Average Co-Inventor Count = 3.00
ph-index = 4
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. American Hoechst Corporation (2 from 233 patents)
2. Other (1 from 832,880 patents)
3. Hoechst Celanese Corporation (1 from 1,194 patents)
4 patents:
1. 4948693 - Positive working color proofing system comprising polyvinyl
2. 4869993 - Optical brightener containing positive working color proofing system
3. 4772533 - Positive working naphthoquinone diazide color proofing element with
4. 4659642 - Positive working naphthoquinone diazide color proofing transfer process