Average Co-Inventor Count = 6.67
ph-index = 7
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. (7 from 213 patents)
2. Johnson and Johnson Vision Care, Inc. (4 from 882 patents)
3. Ppg Industries Ohio, Inc. (1 from 1,742 patents)
12 patents:
1. 12304991 - Photochromic article
2. 9465234 - Photochromic materials having extended pi-conjugated systems and compositions and articles including the same
3. 9097916 - Photochromic materials having extended pi-conjugated systems and compositions and articles including the same
4. 9028728 - Photochromic materials that include indeno-fused naphthopyrans
5. 8741188 - Ophthalmic devices comprising photochromic materials having extended pi-conjugated systems
6. 8647538 - Photochromic compounds having at least two photochromic moieties
7. 8388872 - Photochromic materials having extended pi-conjugated systems and compositions and articles including the same
8. 8349066 - Low temperature, moisture curable coating compositions and related methods
9. 8158037 - Photochromic materials having extended pi-conjugated systems and compositions and articles including the same
10. 8147725 - Photochromic materials having extended pi-conjugated systems and compositions and articles including the same
11. 7556751 - Photochromic materials having electron-withdrawing substituents
12. 7094368 - Pyrano-quinolines, pyrano-quinolinones, combinations thereof, photochromic compositions and articles