Inventor · Pittsburgh, PA, US

Anu Chopra

34Patents
12h-index
50Co-inventors
84Inventor score

Filing activity: Nov 10, 1999 → Nov 7, 2019

Most-cited inventions

PatentTitleAreaCited byStatus
US6113814A Polymerizable polyalkoxylated naphthopyrans Physics 182 Expired
US6296785A Indeno-fused photochromic naphthopyrans Physics 162 Expired
US6348604B1 Photochromic naphthopyrans Physics 123 Expired
US7166357B2 Photochromic articles that activate behind ultraviolet radiation blocking transparencies and methods for preparation Emerging Cross-Sectional Technologies 37 Expired
US8153344B2 Methods for producing photosensitive microparticles, aqueous compositions thereof and articles prepared therewith Physics 35 Active
US7262295B2 Indeno-fused photochromic naphthopyrans, naphthols and photochromic articles Emerging Cross-Sectional Technologies 32 Expired
US8158037B2 Photochromic materials having extended pi-conjugated systems and compositions and articles including the same Emerging Cross-Sectional Technologies 25 Active
US7465415B2 Photochromic materials derived from ring-opening monomers and photochromic initiators Chemistry; Metallurgy 25 Expired
US9028728B2 Photochromic materials that include indeno-fused naphthopyrans Emerging Cross-Sectional Technologies 24 Active
US8741188B2 Ophthalmic devices comprising photochromic materials having extended pi-conjugated systems Emerging Cross-Sectional Technologies 23 Active
US9465234B2 Photochromic materials having extended pi-conjugated systems and compositions and articles including the same Emerging Cross-Sectional Technologies 21 Active
US9097916B2 Photochromic materials having extended pi-conjugated systems and compositions and articles including the same Emerging Cross-Sectional Technologies 21 Active
US7557208B2 Naphthols useful for preparing indeno-fused photochromic naphthopyrans Emerging Cross-Sectional Technologies 12 Active
US8563213B2 Methods for producing photosensitive microparticles Physics 11 Active
US7527754B2 Photochromic indeno-fused naphthopyrans Physics 10 Active
US9034219B2 Photochromic compounds and compositions Chemistry; Metallurgy 9 Active
US8147725B2 Photochromic materials having extended pi-conjugated systems and compositions and articles including the same Emerging Cross-Sectional Technologies 7 Active
US8388872B2 Photochromic materials having extended pi-conjugated systems and compositions and articles including the same Emerging Cross-Sectional Technologies 6 Active
US8815771B2 Mechanochromic coating composition Physics 5 Active
US7556751B2 Photochromic materials having electron-withdrawing substituents Chemistry; Metallurgy 5 Active
US8563212B2 Methods for producing photosensitive microparticles, non-aqueous dispersions thereof and articles prepared therewith Emerging Cross-Sectional Technologies 4 Active
US8647538B2 Photochromic compounds having at least two photochromic moieties Emerging Cross-Sectional Technologies 4 Active
US8748634B2 Photochromic materials demonstrating improved fade rates Chemistry; Metallurgy 3 Active
US8920928B2 Photochromic compounds and compositions Emerging Cross-Sectional Technologies 2 Active
US8535577B2 Photochromic materials that include 6-amino substituted indeno-fused naphthopyrans Physics 2 Active

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.