Average Co-Inventor Count = 7.00
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. Lignotech Usa, Inc. (2 from 20 patents)
2. Hitachi Chemical Company, Ltd. (1,641 patents)
2 patents:
1. 6664002 - Organic expander for lead-acid storage batteries
2. 6346347 - Organic expander for lead-acid storage batteries