Average Co-Inventor Count = 4.22
ph-index = 8
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. Transitions Optical, Inc. (21 from 213 patents)
2. Ppg Industries Ohio, Inc. (1 from 1,742 patents)
22 patents:
1. 12359016 - Method of preparing low haze polymer compositions for use in high refractive index optical materials
2. 12344617 - Indolonaphthopyrans
3. 11518751 - Photochromic indeno-fused naphthopyran compounds with reduced temperature dependence
4. 11453654 - Photochromic indeno fused phenanthrenopyran compounds
5. 10532997 - Photochromic compounds
6. 10532998 - Photochromic compounds
7. 10501446 - Photochromic compounds
8. 10145996 - Photochromic articles that include photochromic-dichroic materials
9. 10005763 - Photochromic compounds
10. 10000472 - Photochromic compounds
11. 9405041 - Photochromic compounds
12. 9334439 - Photochromic articles that include photochromic-dichroic materials
13. 9309455 - Indeno-fused ring compounds
14. 9034219 - Photochromic compounds and compositions
15. 9029532 - 5,6-ring-substituted naphthopyran compounds