Average Co-Inventor Count = 2.05
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. Hoechst Aktiengesellschaft (16 from 6,662 patents)
2. Farbwerke Hoechst Aktiengesellschaft (1 from 1 patent)
3. Wolfgang Rieper (0 patent)
17 patents:
1. 5266110 - Crystal modification of C.I. Pigment Yellow 16
2. 5243032 - Preparation of azo pigments with low PCB content by coupling in the
3. 5194597 - Preparation of a coupling product of bisiazotized
4. 5086168 - Monoazo pigments derived from diazotized di- or trichloroanilines,
5. 5070159 - Addition compounds, a process for the preparation, and their use, based
6. 5066687 - Powdered azo pigments with improved rheological properties, process for
7. 4720541 - Process for improving the application properties of disazo pigments
8. 4631330 - Addition compounds and process for their preparation
9. 4589921 - Process for improving the application properties of pigment yellow 13
10. 4476052 - Azo pigment having improved hiding power and a process for its
11. 4410707 - Process for the manufacture of 3-amino-1-phenylpyrazol-5-one
12. 4124582 - Process for the purification of azo pigments by stirring an aqueous,
13. 4080321 - Monoazo pigments from diazotized acylamino-anilines and acetoacetylamino
14. 4048152 - Modified form of disazo pigment CI 20040
15. 3985725 - Quinolino-azo-aceto-acetylaminobenzimidazolone pigments fast to heat