Average Co-Inventor Count = 2.22
ph-index = 13
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 (39 from 6,662 patents)
2. Clariant Corporation (12 from 480 patents)
3. Hoechst Aktiengescellschaft (1 from 1 patent)
52 patents:
1. 7056378 - Method for producing vattable organic pigments
2. 6646126 - Process for preparing perylene-3,4,9,10-tetracarboxylic diimide in transparent pigment form
3. 6521756 - Process for preparing perylene-3,4,9,10-tetracarboxylic diimide in transparent pigment form
4. 6413309 - Pigment preparations comprising two or more perylene compounds
5. 6312512 - Quinacridone mixed-crystal pigments of the gamma phase
6. 6251553 - Use of mixed-crystal pigments of the quinacridone series in electrophotographic toners and developers, powder coatings and inkjet inks
7. 6241814 - Process for preparing quinacridone pigments
8. 6221150 - Perylene compounds and pigment preparations
9. 6174361 - Process for preparing N,N′-dimethylperylene-3,4,9,10-tetracarboxylic diimide in transparent pigment form
10. 5989333 - Mixed crystal pigments of the quinacridone series
11. 5958129 - Pigment formulations and processes for their preparation
12. 5932727 - Process for the preparation of dioxazine compounds
13. 5800607 - Process for the preparation of liquid pigment preparations
14. 5755874 - Process for preparing linear unsubstituted .beta.-phase quinacridone
15. 5755872 - Process for preparing quinacridone pigments