Average Co-Inventor Count = 1.50
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. Outokumpu Oy (3 from 216 patents)
2. Dutokumpu Oy (1 from 1 patent)
4 patents:
1. 5009870 - Method for removing sulphur and nitrogen compounds from gas
2. 4474654 - Method for removing arsenic from a sulphuric-acid solution
3. 4473396 - Procedure for roasting seleniferous material
4. 4157946 - Process for selective removal of bismuth and antimony from an