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. Other (1 from 832,880 patents)
2. Nl Industries (1 from 319 patents)
3. Halliburton Energy Services, Inc. (11,805 patents)
2 patents:
1. 6562764 - Invert well service fluid and method
2. 4341645 - Aqueous drilling and packer fluids