Assignee
JAMES ROBINSON LTD
US·4 granted patents·99 citations·filing 1998–1999
Top patents by PatentIndex Score
4 records- 0187US6303673B1Photochromic compoundsJAMES ROBINSON LTD·Filed 1998·Granted Oct 16, 2001·19 cites·23 claims
- 0286US6248264B1Neutral coloring photochromic 2H-naphtho[1,2-b] pyrans and heterocyclic pyransJAMES ROBINSON LTD·Filed 1998·Granted Jun 19, 2001·50 cites·10 claims
- 0374US6294112B1Red coloring hyperchromic 3H-naphtho[2,1-B]pyransJAMES ROBINSON LTD·Filed 1998·Granted Sep 25, 2001·22 cites·20 claims
- 0457US6387512B1Grey coloring photochromic fused pyransJAMES ROBINSON LTD·Filed 1999·Granted May 14, 2002·8 cites·15 claims
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