Average Co-Inventor Count = 2.90
ph-index = 3
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. Total Compagnie Francaise Des Petroles (2 from 26 patents)
2. Coatex S.a. (1 from 54 patents)
3. Ciments D'origny (1 from 1 patent)
4. Entreprise Gagneraud Pere & Fils (1 from 1 patent)
5. Total Compagnie Francaise Des Petroles S.a. (1 from 1 patent)
3 patents:
1. 5207832 - Lightened cement grout suitable for the cementation of hydrocarbon
2. 4877452 - Compound cement, more particularly usable in bore holes
3. 4681634 - Composition cimentaire hydraulique a prise retardee pour cimentation a