Average Co-Inventor Count = 2.89
ph-index = 7
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. Cassella Aktiengesellschaft (27 from 260 patents)
2. Clariant Corporation (10 from 480 patents)
3. Hoechst Aktiengesellschaft (4 from 6,662 patents)
4. Bayer Aktiengesellschaft (3 from 12,157 patents)
5. Hans Schwarzkopf Gmbh & Co. Kg (1 from 10 patents)
6. Hoecht Aktienge Sellschaft (1 from 1 patent)
46 patents:
1. 6464768 - Water-soluble stilbene dyes, their preparation and use
2. 6432185 - Red acid dyes for injet printing and paper dyeing
3. 6406527 - Water-soluble red acid dyes, their preparation and use
4. 6359131 - Process for preparing dioxazine compounds
5. 5981766 - Process for the preparation of 4,4'-dimethyl-6,6'-dichlorothioindigo
6. 5961668 - 4-(2,4-diaminophenoxymethyl)-1,3-dioxolane secondary intermediates,
7. 5948910 - Water-soluble perylene dyestuffs, their preparation and their use
8. 5932727 - Process for the preparation of dioxazine compounds
9. 5922086 - Hair colorants based on perimidine derivatives
10. 5902884 - Process for preparing N-alkylcarbazoles
11. 5882360 - Water-soluble copper phthalocyanine dyestuffs, their preparation and
12. 5783710 - Benzothioxanthene dyes, their preparation and their use
13. 5767292 - Processes for preparing 1-methoxy-2-propyl
14. 5668260 - Tetrakisazo Compounds, the method of preparation thereof and the process
15. 5613985 - Hair coloring compositions which contain developers and perimidine