Average Co-Inventor Count = 1.20
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. American Cyanamid Company (3 from 3,580 patents)
3 patents:
1. 4284774 - Sulfoarylated nigrosine dye and use in jet-printing inks
2. 4224071 - Black dyes for ball-point pen inks
3. 4017486 - Cationic alpha-cyano-p-dimethylaminocinnamoyl dyes and paper dyed