Average Co-Inventor Count = 3.00
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. Valmet Fibertech Aktiebolag (2 from 24 patents)
2. Sunds Defibrator Industries Ab (1 from 32 patents)
3 patents:
1. 6454900 - Method for two-stage oxygen delignification of chemical pulp
2. 6319357 - Method for two-stage oxygen bleaching and delignification of chemical pulp
3. 6221206 - Method for oxygen delignification of a digested pulp