Average Co-Inventor Count = 2.40
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. Martin Marietta Corporation (1 from 490 patents)
2. Martin Marietta Aluminum Inc. (1 from 4 patents)
2 patents:
1. 4292188 - Non-abrasive bauxite-based fire retardant
2. 4083925 - Method for removing ferrous iron from alkali metal aluminate liquor